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# Solutions for Chapter 2.5: Precalculus 5th Edition ## Full solutions for Precalculus | 5th Edition

ISBN: 9780321837349 Solutions for Chapter 2.5

Solutions for Chapter 2.5
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##### ISBN: 9780321837349

Chapter 2.5 includes 19 full step-by-step solutions. This textbook survival guide was created for the textbook: Precalculus, edition: 5. Precalculus was written by and is associated to the ISBN: 9780321837349. This expansive textbook survival guide covers the following chapters and their solutions. Since 19 problems in chapter 2.5 have been answered, more than 11761 students have viewed full step-by-step solutions from this chapter.

Key Calculus Terms and definitions covered in this textbook
• Angle between vectors

The angle formed by two nonzero vectors sharing a common initial point

• Arrow

The notation PQ denoting the directed line segment with initial point P and terminal point Q.

• Binomial probability

In an experiment with two possible outcomes, the probability of one outcome occurring k times in n independent trials is P1E2 = n!k!1n - k2!pk11 - p) n-k where p is the probability of the outcome occurring once

• Center

The central point in a circle, ellipse, hyperbola, or sphere

• Constant of variation

See Power function.

• Coordinate(s) of a point

The number associated with a point on a number line, or the ordered pair associated with a point in the Cartesian coordinate plane, or the ordered triple associated with a point in the Cartesian three-dimensional space

• Difference of complex numbers

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

• Double-angle identity

An identity involving a trigonometric function of 2u

• Fundamental

Theorem of Algebra A polynomial function of degree has n complex zeros (counting multiplicity).

• Negative angle

Angle generated by clockwise rotation.

• Product of matrices A and B

The matrix in which each entry is obtained by multiplying the entries of a row of A by the corresponding entries of a column of B and then adding

• Quotient of complex numbers

a + bi c + di = ac + bd c2 + d2 + bc - ad c2 + d2 i

• Reciprocal identity

An identity that equates a trigonometric function with the reciprocal of another trigonometricfunction.

• Recursively defined sequence

A sequence defined by giving the first term (or the first few terms) along with a procedure for finding the subsequent terms.

• Sample standard deviation

The standard deviation computed using only a sample of the entire population.

• Sample survey

A process for gathering data from a subset of a population, usually through direct questioning.

• Unit circle

A circle with radius 1 centered at the origin.

• Upper bound for ƒ

Any number B for which ƒ(x) ? B for all x in the domain of ƒ.

• Upper bound test for real zeros

A test for finding an upper bound for the real zeros of a polynomial.

• Velocity

A vector that specifies the motion of an object in terms of its speed and direction.

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