1990 AMC 12 第 8 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。
8.
方程 的实数解的个数是
The number of real solutions of the equation is
多于 个
more than
小提示：
把两个绝对值理解为数轴上的距离
Interpret the two absolute values as distances on a number line
大提示：
对每个 ，考察它位于 与 之间的情形
Consider every between and
解答：
对每个 ，因此整个区间 中的数都是解，所以解的个数多于 。
所以正确答案是 E。
For every Thus the entire interval consists of solutions, so there are more than
Thus the correct answer is E.
其他年份的第 8 题
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