1/2X-1/X+Y*(X+Y/2X-X-Y)等于多少,

发布时间：2021-02-18 12:15:52

1/2X-1/X+Y*(X+Y/2X-X-Y)等于多少,

网友回答

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======以下答案可供参考======
供参考答案1:
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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