1995 AMC 12 第 2 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
2.
若 ，则
If then
答案：D
小提示：
先将等式两边平方一次，使 单独出现
Square both sides once to isolate
大提示：
分离出内层根式后，再平方一次
After isolating the inner radical, square a second time
解答：
平方得 ，所以 。再次平方得 。因此正确答案是 D。
Squaring gives so Squaring again gives Thus the correct answer is D.
其他年份的第 2 题
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