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Algebra




Introduction to Algebra Section

Algebra is a cornerstone of mathematics that explores relationships between quantities and provides tools to solve problems logically and systematically. It begins with basic operations like addition, subtraction, multiplication, and division but quickly extends to include powers, roots, and logarithms. Central to algebra is the use of equations and inequalities to model and solve problems, helping us determine unknown values based on given conditions.

The study of algebra introduces polynomials, expressions composed of variables and constants combined through arithmetic operations. Techniques like factoring and expanding polynomials allow us to simplify and solve complex equations. Algebra also explores systems of equations, where multiple relationships are analyzed simultaneously to find solutions that satisfy all constraints.

Functions are another key concept in algebra, providing a way to describe how quantities depend on each other. Linear functions, quadratic functions, and exponential relationships reveal patterns and behaviors that are essential for deeper mathematical understanding. Algebra also emphasizes the properties of numbers and operations, such as commutativity and distributivity, which underpin all calculations.

The skills developed in algebra, such as logical reasoning, abstraction, and problem-solving, are invaluable. They find applications in diverse fields, from science and engineering to economics and data analysis, forming a crucial foundation for advanced mathematical studies.

Algebra Formulas

Rules for expanding and factoring binomial expressions. Features Binomial Theorem ((x+y)n((x+y)^n expansion), special products like square of binomial (x+y)2=x2+2xy+y2(x+y)^2 = x^2 + 2xy + y^2, and cube of binomial (x+y)3=x3+3x2y+3xy2+y3(x+y)^3 = x^3 + 3x^2y + 3xy^2 + y^3.
Go to Binomial Rules section →
Core rules for manipulating exponents. Key principles include Product Rule (xmxn=xm+nx^m * x^n = x^{m+n}), Quotient Rule (xm/xn=xmnx^m/x^n = x^{m-n}), Power Rule ((xm)n=xmn)((x^m)^n = x^{mn}), and special cases for zero and negative exponents.
Go to Exponent Rules section →
Fundamental rules for logarithmic manipulation. Includes definition (y=logbxby=x)(y = log_b x ⟺ b^y = x), Product Rule (log(MN)=logM+logN)(log(MN) = log M + log N), Quotient Rule (log(M/N)=logMlogN)(log(M/N) = log M - log N), and Change of Base formula.
Go to Logarithm Laws section →
Rules for manipulating radicals and roots. Features Product Rule for radicals (√(xy) = √x * √y), Quotient Rule (√(x/y) = √x/√y), Power Rule ((xn)=xn/2)(√(x^n) = x^{n/2}), and rationalization techniques. Includes properties for handling even/odd roots and nested radicals.
Go to Radical Rules section →

Product Rule

xmxn=xm+nx^m \cdot x^n = x^{m+n}

Quotient Rule

xmxn=xmn\frac{x^m}{x^n} = x^{m-n}

Power Rule

(xm)n=xmn(x^m)^n = x^{m \cdot n}

Zero Exponent Rule

x0=1,  xR{0}x^0 = 1, \; x \in \mathbb{R} \setminus \{0\}

Negative Exponent Rule

xn=1xnx^{-n} = \frac{1}{x^n}

Fractional Exponent Rule

xmn=xmnx^{\frac{m}{n}} = \sqrt[n]{x^m}

Product to Power Rule

(xy)n=xnyn(xy)^n = x^n y^n

Product Rule for Radicals

xyn=xnyn\sqrt[n]{xy} = \sqrt[n]{x} \cdot \sqrt[n]{y}

Quotient Rule for Radicals

xyn=xnyn\sqrt[n]{\frac{x}{y}} = \frac{\sqrt[n]{x}}{\sqrt[n]{y}}

Power Rule for Radicals

xmn=xmn\sqrt[n]{x^m} = x^{\frac{m}{n}}

Root of a Root Rule

xnm=xmn\sqrt[m]{\sqrt[n]{x}} = \sqrt[mn]{x}

Like Root Addition Rule

axn+bxn=(a+b)xna\sqrt[n]{x} + b\sqrt[n]{x} = (a+b)\sqrt[n]{x}

Even/Odd Root Property

(x)n={xnif n is oddundefined over Rif n is even and x > 0\sqrt[n]{(-x)} = \begin{cases} -\sqrt[n]{x} & \text{if n is odd} \\ \text{undefined over } \mathbb{R} & \text{if n is even and x > 0} \end{cases}

Rationalization Rule

abn=abn1nbnn=abn1nb\frac{a}{\sqrt[n]{b}} = \frac{a\sqrt[n]{b^{n-1}}}{\sqrt[n]{b^n}} = \frac{a\sqrt[n]{b^{n-1}}}{b}

Basic Definition of logarithm

y=logbx    by=xy = \log_b x \iff b^y = x

Product Rule for Logarithms

logb(MN)=logbM+logbN\log_b(MN) = \log_b M + \log_b N

Quotient Rule for Logarithms

logb(MN)=logbMlogbN\log_b(\frac{M}{N}) = \log_b M - \log_b N

Power Rule for Logarithms

logb(Mp)=plogbM\log_b(M^p) = p\log_b M

Change of Base

logbM=logkMlogkb\log_b M = \frac{\log_k M}{\log_k b}

Special Values

logbb=1,logb1=0\log_b b = 1,\quad \log_b 1 = 0

Binomial Theorem

(x+y)n=k=0n(nk)xnkyk=(n0)xn+(n1)xn1y+(n2)xn2y2+...+(nn)yn(x + y)^n = \sum_{k=0}^n \binom{n}{k} x^{n-k}y^k = \binom{n}{0}x^n + \binom{n}{1}x^{n-1}y + \binom{n}{2}x^{n-2}y^2 + ... + \binom{n}{n}y^n

Binomial Coefficient Formula

(nk)=n!k!(nk)!,  n,kN0,  kn\binom{n}{k} = \frac{n!}{k!(n-k)!}, \; n,k \in \mathbb{N}_0, \; k \leq n

Square of Binomial

(x+y)2=x2+2xy+y2(x + y)^2 = x^2 + 2xy + y^2

Square of Difference

(xy)2=x22xy+y2(x - y)^2 = x^2 - 2xy + y^2

Product of Sum and Difference

(x+y)(xy)=x2y2(x + y)(x - y) = x^2 - y^2

Cube of Binomial

(x+y)3=x3+3x2y+3xy2+y3(x + y)^3 = x^3 + 3x^2y + 3xy^2 + y^3

Cube of Difference

(xy)3=x33x2y+3xy2y3(x - y)^3 = x^3 - 3x^2y + 3xy^2 - y^3

Product Rule

xmxn=xm+nx^m \cdot x^n = x^{m+n}

Quotient Rule

xmxn=xmn\frac{x^m}{x^n} = x^{m-n}

Power Rule

(xm)n=xmn(x^m)^n = x^{m \cdot n}

Zero Exponent Rule

x0=1,  xR{0}x^0 = 1, \; x \in \mathbb{R} \setminus \{0\}

Negative Exponent Rule

xn=1xnx^{-n} = \frac{1}{x^n}

Fractional Exponent Rule

xmn=xmnx^{\frac{m}{n}} = \sqrt[n]{x^m}

Product to Power Rule

(xy)n=xnyn(xy)^n = x^n y^n

Product Rule for Radicals

xyn=xnyn\sqrt[n]{xy} = \sqrt[n]{x} \cdot \sqrt[n]{y}

Quotient Rule for Radicals

xyn=xnyn\sqrt[n]{\frac{x}{y}} = \frac{\sqrt[n]{x}}{\sqrt[n]{y}}

Power Rule for Radicals

xmn=xmn\sqrt[n]{x^m} = x^{\frac{m}{n}}

Root of a Root Rule

xnm=xmn\sqrt[m]{\sqrt[n]{x}} = \sqrt[mn]{x}

Like Root Addition Rule

axn+bxn=(a+b)xna\sqrt[n]{x} + b\sqrt[n]{x} = (a+b)\sqrt[n]{x}

Even/Odd Root Property

(x)n={xnif n is oddundefined over Rif n is even and x > 0\sqrt[n]{(-x)} = \begin{cases} -\sqrt[n]{x} & \text{if n is odd} \\ \text{undefined over } \mathbb{R} & \text{if n is even and x > 0} \end{cases}

Rationalization Rule

abn=abn1nbnn=abn1nb\frac{a}{\sqrt[n]{b}} = \frac{a\sqrt[n]{b^{n-1}}}{\sqrt[n]{b^n}} = \frac{a\sqrt[n]{b^{n-1}}}{b}

Basic Definition of logarithm

y=logbx    by=xy = \log_b x \iff b^y = x

Product Rule for Logarithms

logb(MN)=logbM+logbN\log_b(MN) = \log_b M + \log_b N

Quotient Rule for Logarithms

logb(MN)=logbMlogbN\log_b(\frac{M}{N}) = \log_b M - \log_b N

Power Rule for Logarithms

logb(Mp)=plogbM\log_b(M^p) = p\log_b M

Change of Base

logbM=logkMlogkb\log_b M = \frac{\log_k M}{\log_k b}

Special Values

logbb=1,logb1=0\log_b b = 1,\quad \log_b 1 = 0

Binomial Theorem

(x+y)n=k=0n(nk)xnkyk=(n0)xn+(n1)xn1y+(n2)xn2y2+...+(nn)yn(x + y)^n = \sum_{k=0}^n \binom{n}{k} x^{n-k}y^k = \binom{n}{0}x^n + \binom{n}{1}x^{n-1}y + \binom{n}{2}x^{n-2}y^2 + ... + \binom{n}{n}y^n

Binomial Coefficient Formula

(nk)=n!k!(nk)!,  n,kN0,  kn\binom{n}{k} = \frac{n!}{k!(n-k)!}, \; n,k \in \mathbb{N}_0, \; k \leq n

Square of Binomial

(x+y)2=x2+2xy+y2(x + y)^2 = x^2 + 2xy + y^2

Square of Difference

(xy)2=x22xy+y2(x - y)^2 = x^2 - 2xy + y^2

Product of Sum and Difference

(x+y)(xy)=x2y2(x + y)(x - y) = x^2 - y^2

Cube of Binomial

(x+y)3=x3+3x2y+3xy2+y3(x + y)^3 = x^3 + 3x^2y + 3xy^2 + y^3

Cube of Difference

(xy)3=x33x2y+3xy2y3(x - y)^3 = x^3 - 3x^2y + 3xy^2 - y^3
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Algebra Terms and Definitions

Square Root

For a number n, its square root is x where x² = n. Denoted as $\sqrt{n}$ or $n^{1/2}$

Cube Root

For a number n, its cube root is x where x³ = n. Denoted as $\sqrt[3]{n}$ or $n^{1/3}$

Radical Symbol

√ for square root, $\sqrt[n]{x}$ for nth root where n is the index and x is the radicand

Radicand

The expression x under the radical sign in $\sqrt[n]{x}$. The value we're finding the root of

Index (or Degree)

The value n in $\sqrt[n]{x}$ indicating which root to take (square, cube, fourth, etc)

Principal Root

For an even root, the non-negative root out of all possible values. For odd roots, the real root

Perfect Square

A number n = k² where k is an integer. Also called square number

Perfect Cube

A number n = k³ where k is an integer. Also called cubic number

Nth Root

Value x where $x^n = a$, denoted as $\sqrt[n]{a}$ or $a^{1/n}$

Radical Expression

Mathematical expression containing one or more radicals $\sqrt[n]{x}$. Can include coefficients, variables, and operations

Simplifying Radicals

Converting radical to equivalent form with smallest possible radicand and rational coefficients outside

Nested Radicals

Expression containing radicals inside other radicals: $\sqrt{a + \sqrt{b}}$

Surd

An irrational root of a rational number. A radical that cannot be simplified to a rational number

Radical Equation

Equation containing variable(s) under radical sign: $\sqrt{x} = a$ or $\sqrt{f(x)} = g(x)$

Fractional Exponents

Root expressions written as powers: $x^{\frac{1}{n}} = \sqrt[n]{x}$ and $x^{\frac{m}{n}} = (\sqrt[n]{x})^m$

Rationalizing the Denominator

Multiplying numerator and denominator by radical term to eliminate radicals in denominator: $\frac{a}{\sqrt{b}} \cdot \frac{\sqrt{b}}{\sqrt{b}} = \frac{a\sqrt{b}}{b}$

Irrational Root

A root that yields an irrational number - cannot be expressed as p/q where p,q are integers, q≠0

Root Approximation

Methods to find approximate values of roots: Newton's method: $x_{n+1} = x_n - \frac{f(x_n)}{f'(x_n)}$

Conjugate Pair

For expression a + √b, its conjugate is a - √b. Product is a² - b. Used to rationalize denominators

Logarithmic Connection

$\sqrt[n]{a} = e^{\frac{\ln(a)}{n}}$ and $\sqrt[n]{a} = b \iff a = b^n$

Higher-Order Roots

nth root where n > 3: $\sqrt[n]{a}$ is value x where x^n = a

Imaginary Root

For negative real number -a, its square root is i√a where i = √(-1). Higher even roots also yield imaginary results

Logarithm

For positive numbers $b ≠ 1$ and $x > 0$, $log_b(x) = y$ means $b^y = x$. Written as: $\log_b(x) = y \iff b^y = x$

Base

The positive number b ≠ 1 in logarithmic expression $\log_b(x)$ or exponential expression $b^x$

Exponent

The power y in exponential form $b^y$ or the value of logarithm $\log_b(x)$ where $b^y = x$

Natural Logarithm

Logarithm with base $e (≈ 2.71828...)$, written as $ln(x)$ or $\log_e(x)$. Inverse of exponential function $e^x$

Common Logarithm

Logarithm with base 10, written as $log(x)$ or $\log_{10}(x)$. Used for decimal representations

Binary Logarithm

Logarithm with base 2, written as $\log_2(x)$. Used in computer science and information theory

Antilogarithm

The inverse logarithm function: if y = $\log_b(x)$, then $antilog_b(y) = x = b^y$

Characteristic

The integer part n of logarithm where $\log_{10}(x) = n + d$ and $0 ≤ d < 1$

Mantissa

The decimal part d of logarithm where $\log_{10}(x) = n + d$ and $0 ≤ d < 1$

Logarithmic Function

Function $f(x) = \log_b(x)$ where $b > 0, b ≠ 1$. Inverse of exponential function $g(x) = b^x$

Complex Logarithm

For complex $z = r(cos θ + i sin θ)$, $\ln(z) = \ln(r) + i(θ + 2πn)$ where n is integer

Discrete Logarithm

For integers $a, b, m$, find $x$ where $a^x ≡ b \pmod{m}$. Written as $\log_a(b) \pmod{m}$

Logarithmic Scale

Scale where values are spaced by powers of base b: positions proportional to $\log_b(x)$ rather than x

Exponential Form

Equivalent expression of $\log_b(x) = y$ as $b^y = x$, showing inverse relationship between logarithms and exponents

Logarithmic Identity

Fundamental rules for manipulating logarithms with same base b:

Logarithmic Expression

Mathematical expression containing one or more logarithms, may include variables and other operations

Logarithmic Equation

Equation containing logarithmic expressions that must be solved for variable(s)

Logarithmic Inequality

Inequality containing logarithmic expressions to be solved: $\log_b(x) < k$ or $\log_b(f(x)) > \log_b(g(x))$

Asymptote

For logarithmic function $f(x) = \log_b(x)$, vertical asymptote at $x = 0$

Graph of a Logarithmic Function

Plot of $y = \log_b(x)$ showing characteristic shape with vertical asymptote and continuous growth

Base-Change Rule

$\log_a(x) = \frac{\log_c(x)}{\log_c(a)}$ for any base $c > 0, c ≠ 1$

Logarithmic Growth

Growth pattern where variable increases by additive constant when input is multiplied by constant: $f(cx) = f(x) + k$

Logarithmic Transformation

Converting data by taking logarithm: $y = \log_b(x)$ to linearize relationships or normalize distributions

Polynomial

An expression consisting of variables, coefficients, and non-negative integer exponents combined using arithmetic operations.

Coefficient

A numerical factor that multiplies a variable in a polynomial.

Leading Coefficient

The coefficient of the term with the highest degree in a polynomial.

Free Coefficient

The constant term in a polynomial with no variable attached.

Polynomial Degree

The highest exponent of the variable in a polynomial.

Monic Polynomial

A polynomial whose leading coefficient is 1.

Zero Polynomial

A polynomial where all coefficients are zero.

Zero Function

A function that always evaluates to zero for any input.

Undefined Degree

The degree of the zero polynomial, which is not defined.

Minus Infinity Degree

An informal term sometimes used to describe the degree of the zero polynomial.

Polynomial Equation

An equation that sets a polynomial equal to another expression, typically zero.

Polynomial Addition

The sum of two or more polynomials by adding corresponding terms.

Polynomial Subtraction

The difference of two polynomials by subtracting corresponding terms.

Polynomial Multiplication

The product of two polynomials by distributing terms.

Polynomial Division

The process of dividing one polynomial by another, yielding a quotient and remainder.

Dividend

The polynomial being divided in a division operation.

Divisor

The polynomial by which another polynomial is divided.

Quotient

The result of polynomial division before considering the remainder.

Remainder

The leftover polynomial after division that cannot be further divided by the divisor.

Rational Function

A function expressed as the ratio of two polynomials.

Remainder Theorem

A theorem stating that the remainder when a polynomial P(x) is divided by (x - a) is P(a).

Root of a Polynomial

A value of the variable that makes the polynomial equal to zero.

Sum of Coefficients Rule

The sum of all coefficients of a polynomial is found by evaluating it at x = 1.

Factoring

Expressing a polynomial as a product of simpler polynomials.

Quadratic Formula

A formula used to find the roots of a quadratic polynomial.

Complex Roots

Non-real solutions of a polynomial equation, often involving imaginary numbers.

Multiplicity of a Root

The number of times a particular root appears in the factorization of a polynomial.

Fundamental Theorem of Algebra

A theorem stating that every non-constant polynomial has at least one complex root.

Existence Theorem

A principle ensuring the existence of at least one solution for a given polynomial equation.

Factorization

The decomposition of a polynomial into a product of lower-degree polynomials.

Polynomial Derivative

The derivative of a polynomial function, obtained by differentiating each term.

Increased Root

A root of a polynomial whose multiplicity is greater than one.

Linear Factorization

Expressing a polynomial as a product of linear factors corresponding to its roots.

Educated Guess Theorem

A strategy for guessing rational roots of polynomials using integer coefficients.

Integer Coefficients

A polynomial where all coefficients are whole numbers.

Rational Root Theorem

A theorem that provides a possible set of rational roots for a polynomial with integer coefficients.

Factorization Theorem

A theorem stating that polynomials can be factored uniquely over specific number systems.

Polynomial Long Division

A division algorithm for polynomials similar to numerical long division.

Multiple Root

A root of a polynomial that appears more than once.

Finite Field

A mathematical field containing a finite number of elements.

Modular Arithmetic

A system of arithmetic where numbers wrap around after reaching a fixed modulus.

Polynomial Factorization in Finite Fields

The process of breaking a polynomial into irreducible factors within a finite field.

Quadratic Residue

A number that is a square modulo a given prime number.

Polynomial Roots in Finite Fields

The solutions to a polynomial equation within a finite field.

Fundamental Theorem of Algebra (Finite Fields)

A theorem stating that a polynomial of degree n over a finite field has at most n roots in that field.

Direct Substitution Method

A technique for solving polynomials by directly substituting values.

Quadratic Formula in Finite Fields

A modified version of the quadratic formula adapted for finite fields.

Multiple Root in Finite Fields

A root of a polynomial in a finite field that has higher multiplicity.

Vieta's Formulas

A set of equations relating the coefficients of a polynomial to sums and products of its roots.

Sum of Roots

The sum of the roots of a polynomial, given by Vieta’s formulas.

Product of Roots

The product of the roots of a polynomial, also given by Vieta’s formulas.

Coefficient Comparison

A method for finding unknown coefficients by equating polynomials.

Root Multiplicity

The number of times a particular root appears in the factorization of a polynomial.

Polynomial Expansion

The process of expanding a factored polynomial into standard form.

Sigma Notation

A compact way to represent summation, often used in polynomial expressions.

Polynomial Factorization Using Roots

The process of factoring a polynomial using its known roots.

Quadratic and Higher-Degree Root Relations

Relationships between the roots and coefficients of quadratic and higher-degree polynomials.

Exponent

The power to which a base is raised in a mathematical expression.

Base

The number that is raised to the power of the exponent.

Power

The result of raising a base to an exponent.

Exponential Function

A function of the form f(x) = a^x, where a > 0 and a ≠ 1.

Exponential Growth

A process that increases proportionally to its current value, modeled by an exponential function.

Exponential Decay

A process that decreases proportionally to its current value, modeled by an exponential function.

Scientific Notation

A method of writing numbers using powers of 10.

Negative Exponent

Indicates the reciprocal of the base raised to the corresponding positive exponent (a^(-n) = 1/a^n).

Zero Exponent

Any nonzero base raised to the power of zero equals 1 (a^0 = 1).

Fractional Exponent

Represents a root, where a^(1/n) = √[n]{a}.

Integer Exponent

An exponent that is a whole number.

Exponential Equation

An equation in which variables appear in exponents.

Exponential Inequality

An inequality involving exponential expressions.

Exponential Series

A mathematical expansion of e^x as a sum of terms.

Exponentiation

The mathematical operation of raising one quantity to the power of another.

Laws of Exponents

Rules governing exponentiation, such as the product, quotient, and power rules.

Exponential Curve

The graph of an exponential function, showing rapid increase or decrease.

Natural Exponential Function

The exponential function with base e, f(x) = e^x.

Compound Interest Formula

A financial formula based on exponential growth, A = P(1 + r/n)^(nt).

Exponential Notation

A shorthand way to write repeated multiplication of the same factor.

Square Root

For a number n, its square root is x where x² = n. Denoted as $\sqrt{n}$ or $n^{1/2}$

Cube Root

For a number n, its cube root is x where x³ = n. Denoted as $\sqrt[3]{n}$ or $n^{1/3}$

Radical Symbol

√ for square root, $\sqrt[n]{x}$ for nth root where n is the index and x is the radicand

Radicand

The expression x under the radical sign in $\sqrt[n]{x}$. The value we're finding the root of

Index (or Degree)

The value n in $\sqrt[n]{x}$ indicating which root to take (square, cube, fourth, etc)

Principal Root

For an even root, the non-negative root out of all possible values. For odd roots, the real root

Perfect Square

A number n = k² where k is an integer. Also called square number

Perfect Cube

A number n = k³ where k is an integer. Also called cubic number

Nth Root

Value x where $x^n = a$, denoted as $\sqrt[n]{a}$ or $a^{1/n}$

Radical Expression

Mathematical expression containing one or more radicals $\sqrt[n]{x}$. Can include coefficients, variables, and operations

Simplifying Radicals

Converting radical to equivalent form with smallest possible radicand and rational coefficients outside

Nested Radicals

Expression containing radicals inside other radicals: $\sqrt{a + \sqrt{b}}$

Surd

An irrational root of a rational number. A radical that cannot be simplified to a rational number

Radical Equation

Equation containing variable(s) under radical sign: $\sqrt{x} = a$ or $\sqrt{f(x)} = g(x)$

Fractional Exponents

Root expressions written as powers: $x^{\frac{1}{n}} = \sqrt[n]{x}$ and $x^{\frac{m}{n}} = (\sqrt[n]{x})^m$

Rationalizing the Denominator

Multiplying numerator and denominator by radical term to eliminate radicals in denominator: $\frac{a}{\sqrt{b}} \cdot \frac{\sqrt{b}}{\sqrt{b}} = \frac{a\sqrt{b}}{b}$

Irrational Root

A root that yields an irrational number - cannot be expressed as p/q where p,q are integers, q≠0

Root Approximation

Methods to find approximate values of roots: Newton's method: $x_{n+1} = x_n - \frac{f(x_n)}{f'(x_n)}$

Conjugate Pair

For expression a + √b, its conjugate is a - √b. Product is a² - b. Used to rationalize denominators

Logarithmic Connection

$\sqrt[n]{a} = e^{\frac{\ln(a)}{n}}$ and $\sqrt[n]{a} = b \iff a = b^n$

Higher-Order Roots

nth root where n > 3: $\sqrt[n]{a}$ is value x where x^n = a

Imaginary Root

For negative real number -a, its square root is i√a where i = √(-1). Higher even roots also yield imaginary results

Logarithm

For positive numbers $b ≠ 1$ and $x > 0$, $log_b(x) = y$ means $b^y = x$. Written as: $\log_b(x) = y \iff b^y = x$

Base

The positive number b ≠ 1 in logarithmic expression $\log_b(x)$ or exponential expression $b^x$

Exponent

The power y in exponential form $b^y$ or the value of logarithm $\log_b(x)$ where $b^y = x$

Natural Logarithm

Logarithm with base $e (≈ 2.71828...)$, written as $ln(x)$ or $\log_e(x)$. Inverse of exponential function $e^x$

Common Logarithm

Logarithm with base 10, written as $log(x)$ or $\log_{10}(x)$. Used for decimal representations

Binary Logarithm

Logarithm with base 2, written as $\log_2(x)$. Used in computer science and information theory

Antilogarithm

The inverse logarithm function: if y = $\log_b(x)$, then $antilog_b(y) = x = b^y$

Characteristic

The integer part n of logarithm where $\log_{10}(x) = n + d$ and $0 ≤ d < 1$

Mantissa

The decimal part d of logarithm where $\log_{10}(x) = n + d$ and $0 ≤ d < 1$

Logarithmic Function

Function $f(x) = \log_b(x)$ where $b > 0, b ≠ 1$. Inverse of exponential function $g(x) = b^x$

Complex Logarithm

For complex $z = r(cos θ + i sin θ)$, $\ln(z) = \ln(r) + i(θ + 2πn)$ where n is integer

Discrete Logarithm

For integers $a, b, m$, find $x$ where $a^x ≡ b \pmod{m}$. Written as $\log_a(b) \pmod{m}$

Logarithmic Scale

Scale where values are spaced by powers of base b: positions proportional to $\log_b(x)$ rather than x

Exponential Form

Equivalent expression of $\log_b(x) = y$ as $b^y = x$, showing inverse relationship between logarithms and exponents

Logarithmic Identity

Fundamental rules for manipulating logarithms with same base b:

Logarithmic Expression

Mathematical expression containing one or more logarithms, may include variables and other operations

Logarithmic Equation

Equation containing logarithmic expressions that must be solved for variable(s)

Logarithmic Inequality

Inequality containing logarithmic expressions to be solved: $\log_b(x) < k$ or $\log_b(f(x)) > \log_b(g(x))$

Asymptote

For logarithmic function $f(x) = \log_b(x)$, vertical asymptote at $x = 0$

Graph of a Logarithmic Function

Plot of $y = \log_b(x)$ showing characteristic shape with vertical asymptote and continuous growth

Base-Change Rule

$\log_a(x) = \frac{\log_c(x)}{\log_c(a)}$ for any base $c > 0, c ≠ 1$

Logarithmic Growth

Growth pattern where variable increases by additive constant when input is multiplied by constant: $f(cx) = f(x) + k$

Logarithmic Transformation

Converting data by taking logarithm: $y = \log_b(x)$ to linearize relationships or normalize distributions

Polynomial

An expression consisting of variables, coefficients, and non-negative integer exponents combined using arithmetic operations.

Coefficient

A numerical factor that multiplies a variable in a polynomial.

Leading Coefficient

The coefficient of the term with the highest degree in a polynomial.

Free Coefficient

The constant term in a polynomial with no variable attached.

Polynomial Degree

The highest exponent of the variable in a polynomial.

Monic Polynomial

A polynomial whose leading coefficient is 1.

Zero Polynomial

A polynomial where all coefficients are zero.

Zero Function

A function that always evaluates to zero for any input.

Undefined Degree

The degree of the zero polynomial, which is not defined.

Minus Infinity Degree

An informal term sometimes used to describe the degree of the zero polynomial.

Polynomial Equation

An equation that sets a polynomial equal to another expression, typically zero.

Polynomial Addition

The sum of two or more polynomials by adding corresponding terms.

Polynomial Subtraction

The difference of two polynomials by subtracting corresponding terms.

Polynomial Multiplication

The product of two polynomials by distributing terms.

Polynomial Division

The process of dividing one polynomial by another, yielding a quotient and remainder.

Dividend

The polynomial being divided in a division operation.

Divisor

The polynomial by which another polynomial is divided.

Quotient

The result of polynomial division before considering the remainder.

Remainder

The leftover polynomial after division that cannot be further divided by the divisor.

Rational Function

A function expressed as the ratio of two polynomials.

Remainder Theorem

A theorem stating that the remainder when a polynomial P(x) is divided by (x - a) is P(a).

Root of a Polynomial

A value of the variable that makes the polynomial equal to zero.

Sum of Coefficients Rule

The sum of all coefficients of a polynomial is found by evaluating it at x = 1.

Factoring

Expressing a polynomial as a product of simpler polynomials.

Quadratic Formula

A formula used to find the roots of a quadratic polynomial.

Complex Roots

Non-real solutions of a polynomial equation, often involving imaginary numbers.

Multiplicity of a Root

The number of times a particular root appears in the factorization of a polynomial.

Fundamental Theorem of Algebra

A theorem stating that every non-constant polynomial has at least one complex root.

Existence Theorem

A principle ensuring the existence of at least one solution for a given polynomial equation.

Factorization

The decomposition of a polynomial into a product of lower-degree polynomials.

Polynomial Derivative

The derivative of a polynomial function, obtained by differentiating each term.

Increased Root

A root of a polynomial whose multiplicity is greater than one.

Linear Factorization

Expressing a polynomial as a product of linear factors corresponding to its roots.

Educated Guess Theorem

A strategy for guessing rational roots of polynomials using integer coefficients.

Integer Coefficients

A polynomial where all coefficients are whole numbers.

Rational Root Theorem

A theorem that provides a possible set of rational roots for a polynomial with integer coefficients.

Factorization Theorem

A theorem stating that polynomials can be factored uniquely over specific number systems.

Polynomial Long Division

A division algorithm for polynomials similar to numerical long division.

Multiple Root

A root of a polynomial that appears more than once.

Finite Field

A mathematical field containing a finite number of elements.

Modular Arithmetic

A system of arithmetic where numbers wrap around after reaching a fixed modulus.

Polynomial Factorization in Finite Fields

The process of breaking a polynomial into irreducible factors within a finite field.

Quadratic Residue

A number that is a square modulo a given prime number.

Polynomial Roots in Finite Fields

The solutions to a polynomial equation within a finite field.

Fundamental Theorem of Algebra (Finite Fields)

A theorem stating that a polynomial of degree n over a finite field has at most n roots in that field.

Direct Substitution Method

A technique for solving polynomials by directly substituting values.

Quadratic Formula in Finite Fields

A modified version of the quadratic formula adapted for finite fields.

Multiple Root in Finite Fields

A root of a polynomial in a finite field that has higher multiplicity.

Vieta's Formulas

A set of equations relating the coefficients of a polynomial to sums and products of its roots.

Sum of Roots

The sum of the roots of a polynomial, given by Vieta’s formulas.

Product of Roots

The product of the roots of a polynomial, also given by Vieta’s formulas.

Coefficient Comparison

A method for finding unknown coefficients by equating polynomials.

Root Multiplicity

The number of times a particular root appears in the factorization of a polynomial.

Polynomial Expansion

The process of expanding a factored polynomial into standard form.

Sigma Notation

A compact way to represent summation, often used in polynomial expressions.

Polynomial Factorization Using Roots

The process of factoring a polynomial using its known roots.

Quadratic and Higher-Degree Root Relations

Relationships between the roots and coefficients of quadratic and higher-degree polynomials.

Exponent

The power to which a base is raised in a mathematical expression.

Base

The number that is raised to the power of the exponent.

Power

The result of raising a base to an exponent.

Exponential Function

A function of the form f(x) = a^x, where a > 0 and a ≠ 1.

Exponential Growth

A process that increases proportionally to its current value, modeled by an exponential function.

Exponential Decay

A process that decreases proportionally to its current value, modeled by an exponential function.

Scientific Notation

A method of writing numbers using powers of 10.

Negative Exponent

Indicates the reciprocal of the base raised to the corresponding positive exponent (a^(-n) = 1/a^n).

Zero Exponent

Any nonzero base raised to the power of zero equals 1 (a^0 = 1).

Fractional Exponent

Represents a root, where a^(1/n) = √[n]{a}.

Integer Exponent

An exponent that is a whole number.

Exponential Equation

An equation in which variables appear in exponents.

Exponential Inequality

An inequality involving exponential expressions.

Exponential Series

A mathematical expansion of e^x as a sum of terms.

Exponentiation

The mathematical operation of raising one quantity to the power of another.

Laws of Exponents

Rules governing exponentiation, such as the product, quotient, and power rules.

Exponential Curve

The graph of an exponential function, showing rapid increase or decrease.

Natural Exponential Function

The exponential function with base e, f(x) = e^x.

Compound Interest Formula

A financial formula based on exponential growth, A = P(1 + r/n)^(nt).

Exponential Notation

A shorthand way to write repeated multiplication of the same factor.
Rules and operations involving powers. Features basic concepts like Base and Power, Laws of Exponents, Exponential Functions (a^x), and applications in growth/decay. Includes special cases like Zero, Negative, and Fractional exponents.
Go to Exponents section →
Functions that determine the exponent needed for a base to reach a number. Includes Natural Logarithm (base e), Common Logarithm (base 10), Binary Logarithm (base 2), and their properties. Covers logarithmic functions, equations, identities and transformations.
Go to Logarithms section →
Core concepts and operations with roots. Key terms include Square Root (x where x² = n), Cube Root (x where x³ = n), Radical Symbol (√), Perfect Squares/Cubes, and methods of simplification. Covers both real and imaginary roots, radical expressions, and related operations.
Go to Roots section →
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