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1/2x²y·()=2x³y-x²y²
人气:374 ℃ 时间:2020-04-21 19:55:03
解答
0.5x²y·()=2x³y-x²y²? ()=(2x³y-x²y²)/(0.5x²y) =(2x³y)/(0.5x²y)-(x²y²)/(0.5x²y) =4x-2y
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