 2.1.2.2.2: In Exercises 1 8, add or subtract as indicated and write the result...
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 2.1.2.2.58: Evaluate for x x = 1 + i. 2  2x + 2
 2.1.2.2.59: Evaluate for x x = 1  2i. 2  2x + 5
 2.1.2.2.60: Evaluate for x = 3i. x
 2.1.2.2.61: Evaluate for x2 + 113  x
 2.1.2.2.62: Find the voltage of a circuit, if amperes and ohms.
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 2.1.2.2.64: The mathematician Girolamo Cardano is credited with the first use (...
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 2.1.2.2.68: What is the complex conjugate of What happens when you multiply thi...
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 2.1.2.2.70: Explain each of the three jokes in the cartoon on page 278.
 2.1.2.2.71: A standup comedian uses algebra in some jokes, including one about...
 2.1.2.2.72: Explain the error in Exercises 71 72. 29 + 216 = 225 = i225 = 5i
 2.1.2.2.73: Explain the error in Exercises 71 72. A 29B 2= 29 # 29 = 281 = 9
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 2.1.2.2.75: The word imaginary in imaginary numbers tells me that these numbers...
 2.1.2.2.76: By writing the imaginary number I can immediately see that 5 is the...
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 2.1.2.2.85: Exercises 84 86 will help you prepare for the material covered in t...
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Solutions for Chapter 2.1: Complex Numbers
Full solutions for Precalculus  4th Edition
ISBN: 9780321559845
Solutions for Chapter 2.1: Complex Numbers
Get Full SolutionsSince 86 problems in chapter 2.1: Complex Numbers have been answered, more than 67013 students have viewed full stepbystep solutions from this chapter. This textbook survival guide was created for the textbook: Precalculus, edition: 4. Precalculus was written by and is associated to the ISBN: 9780321559845. This expansive textbook survival guide covers the following chapters and their solutions. Chapter 2.1: Complex Numbers includes 86 full stepbystep solutions.

Arcsecant function
See Inverse secant function.

Backtoback stemplot
A stemplot with leaves on either side used to compare two distributions.

Bias
A flaw in the design of a sampling process that systematically causes the sample to differ from the population with respect to the statistic being measured. Undercoverage bias results when the sample systematically excludes one or more segments of the population. Voluntary response bias results when a sample consists only of those who volunteer their responses. Response bias results when the sampling design intentionally or unintentionally influences the responses

Cardioid
A limaçon whose polar equation is r = a ± a sin ?, or r = a ± a cos ?, where a > 0.

Constant of variation
See Power function.

Cube root
nth root, where n = 3 (see Principal nth root),

Ellipsoid of revolution
A surface generated by rotating an ellipse about its major axis

Equally likely outcomes
Outcomes of an experiment that have the same probability of occurring.

Finite sequence
A function whose domain is the first n positive integers for some fixed integer n.

Inequality
A statement that compares two quantities using an inequality symbol

Interval notation
Notation used to specify intervals, pp. 4, 5.

Inverse function
The inverse relation of a onetoone function.

Negative association
A relationship between two variables in which higher values of one variable are generally associated with lower values of the other variable.

Observational study
A process for gathering data from a subset of a population through current or past observations. This differs from an experiment in that no treatment is imposed.

Probability distribution
The collection of probabilities of outcomes in a sample space assigned by a probability function.

Sinusoidal regression
A procedure for fitting a curve y = a sin (bx + c) + d to a set of data

Standard form of a polynomial function
ƒ(x) = an x n + an1x n1 + Á + a1x + a0

Terminal point
See Arrow.

Terminal side of an angle
See Angle.

Upper bound for real zeros
A number d is an upper bound for the set of real zeros of ƒ if ƒ(x) ? 0 whenever x > d.