 9.4.39: In Exercises 3946, identify the conic represented by each equation ...
 9.4.40: In Exercises 3946, identify the conic represented by each equation ...
 9.4.41: In Exercises 3946, identify the conic represented by each equation ...
 9.4.42: In Exercises 3946, identify the conic represented by each equation ...
 9.4.43: In Exercises 3946, identify the conic represented by each equation ...
 9.4.44: In Exercises 3946, identify the conic represented by each equation ...
 9.4.45: In Exercises 3946, identify the conic represented by each equation ...
 9.4.46: In Exercises 3946, identify the conic represented by each equation ...
 9.4.47: In Exercises 4751, a. Rewrite the equation in a rotated xy@system w...
 9.4.48: In Exercises 4751, a. Rewrite the equation in a rotated xy@system w...
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 9.4.51: In Exercises 4751, a. Rewrite the equation in a rotated xy@system w...
Solutions for Chapter 9.4: Precalculus 5th Edition
Full solutions for Precalculus  5th Edition
ISBN: 9780321837349
Solutions for Chapter 9.4
Get Full SolutionsSince 13 problems in chapter 9.4 have been answered, more than 10614 students have viewed full stepbystep solutions from this chapter. This expansive textbook survival guide covers the following chapters and their solutions. This textbook survival guide was created for the textbook: Precalculus, edition: 5. Chapter 9.4 includes 13 full stepbystep solutions. Precalculus was written by and is associated to the ISBN: 9780321837349.

Absolute value of a complex number
The absolute value of the complex number z = a + b is given by ?a2+b2; also, the length of the segment from the origin to z in the complex plane.

Bounded below
A function is bounded below if there is a number b such that b ? ƒ(x) for all x in the domain of f.

Chord of a conic
A line segment with endpoints on the conic

Conversion factor
A ratio equal to 1, used for unit conversion

Cycloid
The graph of the parametric equations

Distance (in Cartesian space)
The distance d(P, Q) between and P(x, y, z) and Q(x, y, z) or d(P, Q) ((x )  x 2)2 + (y1  y2)2 + (z 1  z 2)2

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.

Focal length of a parabola
The directed distance from the vertex to the focus.

Leading coefficient
See Polynomial function in x

Local maximum
A value ƒ(c) is a local maximum of ƒ if there is an open interval I containing c such that ƒ(x) < ƒ(c) for all values of x in I

Mathematical induction
A process for proving that a statement is true for all natural numbers n by showing that it is true for n = 1 (the anchor) and that, if it is true for n = k, then it must be true for n = k + 1 (the inductive step)

Monomial function
A polynomial with exactly one term.

Multiplicative inverse of a matrix
See Inverse of a matrix

Oddeven identity
For a basic trigonometric function f, an identity relating f(x) to f(x).

Perihelion
The closest point to the Sun in a planet’s orbit.

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

Pythagorean
Theorem In a right triangle with sides a and b and hypotenuse c, c2 = a2 + b2

Relevant domain
The portion of the domain applicable to the situation being modeled.

Variance
The square of the standard deviation.

Vertical asymptote
The line x = a is a vertical asymptote of the graph of the function ƒ if limx:a+ ƒ1x2 = q or lim x:a ƒ1x2 = q.