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解:
(x-y)分之2x+(y-x)分之2y
=2x/(x-y)+2y/(y-x)
=2x/(x-y)-2y/(x-y)
=(2x-2y)/(x-y)
=2(x-y)/(x-y)
=2
(x-y)分之2x+(y-x)分之2y=2
(x-y)分之2x+(y-x)分之2y
=2x/(x-y)+2y/(y-x)
=2x/(x-y)-2y/(x-y)
=(2x-2y)/(x-y)
=2(x-y)/(x-y)
=2
(x-y)分之2x+(y-x)分之2y=2
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2017-12-07
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2x/(x-y)+2y/(y-x)=2
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