1962 AMC 12 第 29 题
先试着解答 1962 AMC 12 第 29 题，然后核对你的答案与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 1962 AMC 12 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
29.
下列哪组 值满足不等式 ？
Which of the following sets of -values satisfy the inequality
或
or
小提示：
将所有项移到一边，并分解二次式
Move all terms to one side and factor the quadratic
大提示：
两个一次因式的乘积在两根之间为负
A product of two linear factors is negative between its roots
解答：
该不等式为 。分解得 。乘积在两根之间为负，所以 。
所以正确答案是 A。
The inequality is Factoring gives The product is negative between its roots, so
Thus, the correct answer is A.
其他年份的第 29 题
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- 1999 AMC 12