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X²-X+1/X-1 化简
人气:494 ℃ 时间:2020-07-02 18:20:54
解答
X²-X+1/X-1
=x(x-1)-1/x(x-1)
=(x-1)(x-1/x)
=1/x(x-1)(X²-1)
=1/x(x-1)²(x+1)
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