计算:1/(x-y)+1/(2y-2x)

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

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

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


1/(x-y)+1/(2y-2x)
=2/2(x-y)-1/2(x-y)
=1/ 2(x-y)