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化简1/2x-1/x+y(x+y/2x-x-y)
人气:368 ℃ 时间:2020-06-06 19:41:02
解答
原式=1/2x-1/(x+y)[(x+y)/2x-(x+y)]
=1/2x-1/(x+y)×(x+y)(1/2x-1)
=1/2x-(1/2x-1)
=1/2x-1/2x+1
=1
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