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(2ab²)-²/(a-²b)³
人气:369 ℃ 时间:2020-02-05 18:03:43
解答
(2ab²)-²/(a-²b)³解,得:==1/(2ab²)²*[1/(a^-6*b³)]==1/(2ab²)²*[1/(b³/a^6)]==1/(4a^2b^4)*(a^6/b³)==a^4/4b^7
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