83-84 - Signs of Numbers Let a, b, and c be real numbers such that a >0, b<0, and c < 0. Find the sign of each expression. 83. (а) -а (b) bc (c) a - b (d) ab + ac 84. (a) -b (b) a + bc (с) с— а (d) ab?
83-84 - Signs of Numbers Let a, b, and c be real numbers such that a >0, b<0, and c < 0. Find the sign of each expression. 83. (а) -а (b) bc (c) a - b (d) ab + ac 84. (a) -b (b) a + bc (с) с— а (d) ab?
Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
ChapterP: Prerequisites
SectionP.2: Real Numbers
Problem 7E: 6-8 Yes or No? If No, give a reason. Assume that a and b are nonzero real numbers. a Is ab equal to...
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