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化简(a+1/a-1)-(a平方+a/a平方-1)
人气:312 ℃ 时间:2020-02-03 21:23:26
解答
(a+1/a-1)-(a平方+a/a平方-1)
=(a+1/a-1)-[a(a+1)/(a+1)(a-1)]
=(a+1/a-1)-a/(a-1)
=(a+1-a)/(a-1)
=1/(a-1)
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