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【(X²+Y²)-(X-Y)²+2Y(X-Y)】/4Y=1,求4X/4X²-Y²-1/2X-Y的值
人气:250 ℃ 时间:2020-06-02 12:50:28
解答
【(X²+Y²)-(X-Y)²+2Y(X-Y)】/4Y=1,【2xy+2Y(X-Y)】/4Y=14x-2y=42x-y=24X/(4X²-Y²)-1/(2X-Y) =4X/(4X²-Y²)-(2x+y)/(4X²-Y²)=(2x-y)/(4X²-Y²)=1/(2...
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