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2x分之1- x+y分之1(2x分之x+y -x-y)化简
人气:378 ℃ 时间:2020-05-22 23:18:19
解答
看不清也
(1-x)/2x-[1/(x+y)][(x+y)/2x-x-y]
=1/2x-1/2-[1/(x+y)][(x+y)/2x-(x+y)]
=1/2x-1/2-1/2x+1/2
=0
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