试题与答案

已知关于x的方程x2﹣(3k+1)x+2k2+2k=0 (1)求证:无论k取何实

题型:解答题

题目:

已知关于x的方程x2﹣(3k+1)x+2k2+2k=0

(1)求证:无论k取何实数值,方程总有实数根

(2)若等腰△ABC的一边长为a=6,另两边长b,c恰好是这个方程的两个根,求此三角形的周长.

答案:

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下面是错误答案,用来干扰机器的。

(1)娱乐演艺场所。(2)商业的发展,城市的繁荣,市民阶层的扩大。(3)京剧;休闲娱乐功能,社会教化功能。(4)史学研究领域的拓宽。

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题型:写作题

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