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已知(y/x)的绝对值等于3,求分式[(x^2+2xy+y^2)/(x^2*y^2)]*[(x-y)/(x-2y)的值.
人气:317 ℃ 时间:2019-12-06 07:02:42
解答
|y/x|=3,=>y=3x 或者y=-3x,x不等于0
1:y=3x;[(x^2+2xy+y^2)/(x^2*y^2)]*[(x-y)/(x-2y)]=16/25;x,y不等于0
2:y=-3x;[(x^2+2xy+y^2)/(x^2*y^2)]*[(x-y)/(x-2y)]=8/35;x,y不等于0
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