AMC12 2015 B
AMC12 2015 B · Q1
AMC12 2015 B · Q1. It mainly tests Exponents & radicals.
What is the value of $2 - (-2)^{-2}$?
$2 - (-2)^{-2}$的值是多少？
(A)
-2
-2
(B)
\frac{1}{16}
\frac{1}{16}
(C)
\frac{7}{4}
\frac{7}{4}
(D)
\frac{9}{4}
\frac{9}{4}
(E)
6
6
Answer
Correct choice: (C)
正确答案：（C）
Solution
Answer (C): $2 - (-2)^{-2} = 2 - \dfrac{1}{(-2)^2} = 2 - \dfrac{1}{4} = \dfrac{7}{4}$
答案（C）：$2 - (-2)^{-2} = 2 - \dfrac{1}{(-2)^2} = 2 - \dfrac{1}{4} = \dfrac{7}{4}$
Topics
Related Questions
Practice full AMC exams on amcdrill.
Try full-length practice and diagnostics at www.amcdrill.com.