 Chapter 1.1: Algebraic Expressions, real Numbers, and Interval Novation
 Chapter 1.2: Operations with Real Numbers and Simplifying Algebraic Expressions
 Chapter 1.3: Graphing Equations
 Chapter 1.4: Solving Linear Equations
 Chapter 1.5: Problem Solving and Using Formulas
 Chapter 1.6: Properties of Integral Exponents
 Chapter 1.7: Scientific Notation
 Chapter 10.1: Distance and Midpoint Formulas; Circles
 Chapter 10.2: The Ellipse
 Chapter 10.3: The Hyperbola
 Chapter 10.4: The Parabola; Identifying Conic Sections
 Chapter 10.5: Systems of Nonlinear Equations in Two Variables
 Chapter 11.1: Sequences and Summation Notation
 Chapter 11.2: Arithmetic Sequences
 Chapter 11.3: Geometric Sequences and Series
 Chapter 11.4: The Binomial Theorem
 Chapter 2.1: Introduction to Functions
 Chapter 2.2: Graphs of Functions
 Chapter 2.3: The Algebra of Functions
 Chapter 2.4: Linear Functions and Slope
 Chapter 2.5: The Point SlopeForm of the Equation of a Line
 Chapter 3.1: Systems of Linear Equations in Two Variables
 Chapter 3.2: Problem Solving and Business Applications Using Systems of Equations
 Chapter 3.3: Systems of Linear Equations in Three Variables
 Chapter 3.4: Matrix Solutions of Linear Systems
 Chapter 3.5: Determinants and Cramers Rule
 Chapter 4.1: Solving Linear Inequalities
 Chapter 4.2: Compound Inequalities
 Chapter 4.3: Equations and Inequalities Involving Absolute Value
 Chapter 4.4: Linear Inequalities in Two Variables
 Chapter 4.5: Linear Programming
 Chapter 5.1: Introduction to Polynomials and Polynomial Functions
 Chapter 5.2: Multiplication of Polynomials
 Chapter 5.3: Greatest Common Factors and Factoring by Grouping
 Chapter 5.4: Factoring Trinomials
 Chapter 5.5: Factoring Special Forms
 Chapter 5.6: A General Factoring Strategy
 Chapter 5.7: Polynomial Equations and Their Applications
 Chapter 6.1: Rational Expressions and Functions: Multiplying and Dividing
 Chapter 6.2: Adding and Subtracting Rational Expressions
 Chapter 6.3: Complex Rational Expressions
 Chapter 6.4: Division of Polynomials
 Chapter 6.5: Synthetic Division and the Remainder Theorem
 Chapter 6.6: Rational Equations
 Chapter 6.7: Formulas and Applications of Rational Equations
 Chapter 6.8: Modeling Using Variation
 Chapter 7.1: Radical Expressions and Functions
 Chapter 7.2: Rational Exponents
 Chapter 7.3: Multiplying and Simplifying Radical Expressions
 Chapter 7.4: Adding, Subtracting, and Dividing Radical Expressions
 Chapter 7.5: Multiplying with More Than One Term and Rationalizing Denominators
 Chapter 7.6: Radical Equations
 Chapter 8.1: The Square Root Property and Completing the Square
 Chapter 8.2: The Quadratic Formula
 Chapter 8.3: Quadratic Functions and Their Graphs
 Chapter 8.4: Equations Quadratic in Form
 Chapter 8.5: Polynomial and Rational Inequalities
 Chapter 9.1: Exponential Functions
 Chapter 9.2: Composite and Inverse Functions
 Chapter 9.3: Logarithmic Functions
 Chapter 9.4: Properties of Logarithms
 Chapter 9.5: Exponential and Logarithmic Equations
 Chapter 9.6: Exponential Growth and Decay; Modeling Data
 Chapter Chapter 1: Algebra, Mathematical Models, and Problem Solving
 Chapter Chapter 10: Conic Sections and Systems of Nonlinear Equations
 Chapter Chapter 11: Sequences, Series, and the Binomial Theorem
 Chapter Chapter 2: Functions and Linear Equations
 Chapter Chapter 3: Systems of Linear Equations
 Chapter Chapter 4: Inequalities and Problem Solving
 Chapter Chapter 5: Polynomials, Polynomial Functions, and Factoring
 Chapter Chapter 6: Rational Expressions, Functions, and Equations
 Chapter Chapter 7: Radicals, Radical Functions, and Rational Exponents
 Chapter Chapter 8: Quadratic Equations and Functions
 Chapter Chapter 9: Exponential and Logarithmic Functions
Intermediate Algebra for College Students 6th Edition  Solutions by Chapter
Full solutions for Intermediate Algebra for College Students  6th Edition
ISBN: 9780321758934
Intermediate Algebra for College Students  6th Edition  Solutions by Chapter
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CayleyHamilton Theorem.
peA) = det(A  AI) has peA) = zero matrix.

Column space C (A) =
space of all combinations of the columns of A.

Condition number
cond(A) = c(A) = IIAIlIIAIII = amaxlamin. In Ax = b, the relative change Ilox III Ilx II is less than cond(A) times the relative change Ilob III lib II· Condition numbers measure the sensitivity of the output to change in the input.

Conjugate Gradient Method.
A sequence of steps (end of Chapter 9) to solve positive definite Ax = b by minimizing !x T Ax  x Tb over growing Krylov subspaces.

Dimension of vector space
dim(V) = number of vectors in any basis for V.

Free columns of A.
Columns without pivots; these are combinations of earlier columns.

Inverse matrix AI.
Square matrix with AI A = I and AAl = I. No inverse if det A = 0 and rank(A) < n and Ax = 0 for a nonzero vector x. The inverses of AB and AT are B1 AI and (AI)T. Cofactor formula (Al)ij = Cji! detA.

Linearly dependent VI, ... , Vn.
A combination other than all Ci = 0 gives L Ci Vi = O.

Matrix multiplication AB.
The i, j entry of AB is (row i of A)·(column j of B) = L aikbkj. By columns: Column j of AB = A times column j of B. By rows: row i of A multiplies B. Columns times rows: AB = sum of (column k)(row k). All these equivalent definitions come from the rule that A B times x equals A times B x .

Normal equation AT Ax = ATb.
Gives the least squares solution to Ax = b if A has full rank n (independent columns). The equation says that (columns of A)·(b  Ax) = o.

Normal matrix.
If N NT = NT N, then N has orthonormal (complex) eigenvectors.

Plane (or hyperplane) in Rn.
Vectors x with aT x = O. Plane is perpendicular to a =1= O.

Projection matrix P onto subspace S.
Projection p = P b is the closest point to b in S, error e = b  Pb is perpendicularto S. p 2 = P = pT, eigenvalues are 1 or 0, eigenvectors are in S or S...L. If columns of A = basis for S then P = A (AT A) 1 AT.

Rank one matrix A = uvT f=. O.
Column and row spaces = lines cu and cv.

Rotation matrix
R = [~ CS ] rotates the plane by () and R 1 = RT rotates back by (). Eigenvalues are eiO and eiO , eigenvectors are (1, ±i). c, s = cos (), sin ().

Schur complement S, D  C A } B.
Appears in block elimination on [~ g ].

Solvable system Ax = b.
The right side b is in the column space of A.

Special solutions to As = O.
One free variable is Si = 1, other free variables = o.

Spectral Theorem A = QAQT.
Real symmetric A has real A'S and orthonormal q's.

Vector v in Rn.
Sequence of n real numbers v = (VI, ... , Vn) = point in Rn.