计算:1/2x-1/x+y×(x+y/2x-x-y)

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计算:1/2x-1/x+y×(x+y/2x-x-y)计算:1/2x-1/x+y×(x+y/2x-x-y)计算:1/2x-1/x+y×(x+y/2x-x-y)=1/2x-1/(x+y)×[(x+y)/2

计算:1/2x-1/x+y×(x+y/2x-x-y)
计算:1/2x-1/x+y×(x+y/2x-x-y)

计算:1/2x-1/x+y×(x+y/2x-x-y)
=1/2x-1/(x+y)×[(x+y)/2x-(x+y)]
=1/2x-1/2x+1
=1/x+1
=(x+1)/x