a. For any nonzero real number a, what can we say about
Chapter 4, Problem 4.2.17(choose chapter or problem)
a. For any nonzero real number a, what can we say about the sign of the expression (a) n when n is an even integer? What can we say about the sign of (a) n when n is an odd integer? b. What is the sign of the resulting number if a is a positive number? If a is a negative number? Explain your answer.
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