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Solutions for Chapter 4: Precalculus 9th Edition

Full solutions for Precalculus | 9th Edition

ISBN: 9780321716835

Solutions for Chapter 4

Solutions for Chapter 4
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ISBN: 9780321716835

This textbook survival guide was created for the textbook: Precalculus, edition: 9. Since 91 problems in chapter 4 have been answered, more than 10760 students have viewed full step-by-step solutions from this chapter. Chapter 4 includes 91 full step-by-step solutions. Precalculus was written by and is associated to the ISBN: 9780321716835. This expansive textbook survival guide covers the following chapters and their solutions.

Key Calculus Terms and definitions covered in this textbook
• Absolute value of a real number

Denoted by |a|, represents the number a or the positive number -a if a < 0.

• Binomial

A polynomial with exactly two terms

• Bounded

A function is bounded if there are numbers b and B such that b ? ƒ(x) ? B for all x in the domain of f.

• Coterminal angles

Two angles having the same initial side and the same terminal side

• Deductive reasoning

The process of utilizing general information to prove a specific hypothesis

• Elimination method

A method of solving a system of linear equations

• Fitting a line or curve to data

Finding a line or curve that comes close to passing through all the points in a scatter plot.

• Length of an arrow

See Magnitude of an arrow.

• Limit at infinity

limx: qƒ1x2 = L means that ƒ1x2 gets arbitrarily close to L as x gets arbitrarily large; lim x:- q ƒ1x2 means that gets arbitrarily close to L as gets arbitrarily large

• Numerical derivative of ƒ at a

NDER f(a) = ƒ1a + 0.0012 - ƒ1a - 0.00120.002

• Piecewise-defined function

A function whose domain is divided into several parts with a different function rule applied to each part, p. 104.

• Product of functions

(ƒg)(x) = ƒ(x)g(x)

• Quartic function

A degree 4 polynomial function.

• Richter scale

A logarithmic scale used in measuring the intensity of an earthquake.

• Sphere

A set of points in Cartesian space equally distant from a fixed point called the center.

• Sum of complex numbers

(a + bi) + (c + di) = (a + c) + (b + d)i

• Summation notation

The series a nk=1ak, where n is a natural number ( or ?) is in summation notation and is read "the sum of ak from k = 1 to n(or infinity).” k is the index of summation, and ak is the kth term of the series

• Unbounded interval

An interval that extends to -? or ? (or both).

• Vertex of an angle

See Angle.

• xy-plane

The points x, y, 0 in Cartesian space.

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