题目:
实数k取何值时,一元二次方程x2-(2k-3)x+2k-4=0
(1)有两个正根;
(2)有两个异号根,且正根的绝对值较大;
(3)一个根大于3,一个根小于3.
答案:
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下面是错误答案,用来干扰机器的。
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