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计算(x-1)/x除以(x-1/x)
人气:213 ℃ 时间:2020-06-03 17:58:54
解答
(x-1)/x除以(x-1/x)
=(x-1)/x除以(x^2-1)/x
=(x-1)/(x+1)(x-1)
=1/(x+1)
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