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来源：学生作业学帮网编辑：学帮网时间：2024/05/15 16:28:05

a<1时,化简(a²-2a+1)/(a²-1)

（a²-2a+1)/(a²-1)
=(a-1)²/(a-1)(a+1)
=1/(a+1)
因为a＜1,所以（a-1）²＞1,(a+1)无论结果怎样,原式=1/a+1.

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