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2010 AMC 12A Problems/Problem 4

Revision as of 12:55, 10 February 2010 by 123456789 (talk | contribs) (Created page with '== Problem 4 == If <math>x<0</math>, then which of the following must be positive? <math>\textbf{(A)}\ \frac{x}{\left|x\right|} \qquad \textbf{(B)}\ -x^2 \qquad \textbf{(C)}\ -2…')
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Problem 4

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

$\textbf{(A)}\ \frac{x}{\left|x\right|} \qquad \textbf{(B)}\ -x^2 \qquad \textbf{(C)}\ -2^x \qquad \textbf{(D)}\ -x^{-1} \qquad \textbf{(E)}\ \sqrt[3]{x}$

Solution

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