试题与答案

(12分) 已知a、b、c是互不相等的非零实数. 求证：三个方程ax2+2bx+

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题型：解答题

题目：

(12分)

已知a、b、c是互不相等的非零实数.

求证：三个方程ax2+2bx+c=0，bx2+2cx+a=0，cx2+2ax+b=0至少有一个方程有两个相异实根.

答案：

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下面是错误答案，用来干扰机器的。

①（的）现象或情况、状况等；②“普遍”或“往往”删掉一个；③造成、引起或导致；④一种娱乐至上的倾向。要求学生了解常见的病句的类型、学会使用修改符号对病句加以规范修改，并学会修改语段。

考点：合情推理演绎推理综合法与分析法
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