(急)计算(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³如题
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(急)计算(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³如题
(急)计算(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³
如题
(急)计算(x²-y²/xy)²÷(x+y/y)²·(x/x-y)³如题
(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)