化简:(1/(x-y)—1/(x+y))除以2y/(x^2-2xy+y^2)
2个回答
:(1/(x-y)—1/(x+y))除以2y/(x^2-2xy+y^2)
=2y/[(x+y)(x-y)]*(x-y)^2/(2y)
=(x-y)/(x+y)
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