每日一题

Mathematics>Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

If x^-2 = 16, what is the value of x^2?

(A) 1/16
(B) 1/4
(C) 2
(D) 4
(E) 12

答案和解析

答案：A

解析：

If x^-2 = 16, then 1/x^2 = 16, so x^2 = 1/16.