GRE Question of the Day (June 18th)

Math

Define \({x^*}\) by the equation \({x^* = \frac{{\pi}}{{x}}}\). Then \({((-\pi)^*)^*}\) =

A. \({\frac{{-1}}{{\pi}}}\)

B. \({\frac{{-1}}{{2}}}\)

C. \({- \pi}\)

D. \({\frac{{1}}{{\pi}}}\)

E. \({\pi}\)

Question Discussion & Explanation