(-x/y)²×(-y²/x)³÷(-xy的四次方)计算
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(-x/y)²×(-y²/x)³÷(-xy的四次方)计算
(-x/y)²×(-y²/x)³÷(-xy的四次方)
计算
(-x/y)²×(-y²/x)³÷(-xy的四次方)计算
原式=x²/y²×(-y^6/x³)×(-1/xy^4)
=x³/(x³*x)*y^6/(y²*y^4)
=1/x*1
=1/x
-y/(x的五次方)