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(急)计算(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³
如题
人气:208 ℃ 时间:2019-08-19 11:41:47
解答
(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³=[(x+y)²(x-y)²/x²y²]×[y²/(x+y)²]×[x³/(x-y)³]=(x-y)²/x²×x³/(x-y)³=x/(x-y)
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