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若m/x²-y²=2xy-y²/x²-y²+x-y/x+y,则m的值为
人气:141 ℃ 时间:2020-06-26 20:00:53
解答
m/x²-y²
=[2xy-y²+(x-y)²]/(x²-y²)
=(2xy-y²+x²-2xy+y²)/(x²-y²)
=x²/(x²-y²)
所以m=x²
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