AMC10 2015 B
AMC10 2015 B · Q1
AMC10 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.