AMC 12A 2010 Problem 4

Past Contests AMC 12 AMC 12A - 2010
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1

If x<0, then which of the following must be positive?

Answer Choices
A. \dfrac{x}{|x|}
B. -x^{2}
C. -2^{x}
D. -x^{-1}
E. \sqrt[3]{x}