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数学
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(2x/3y²)²÷(-x/y)³
人气:197 ℃ 时间:2020-04-09 09:57:22
解答
(2x/3y²)²÷(-x/y)³
=(4/9*x^2/y^4)÷(-x^3/y^3)
=-4/9*x^2/y^4*y^3/x^3
=-4/(9xy)
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