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数学
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99的9次方加99分之1的十次方等于多少
人气:194 ℃ 时间:2019-10-08 18:51:10
解答
估计是乘,不是加
99^9*(1/99)^10
=99^9*(1/99)^9*1/99
=(99*1/99)^9*1/99
=1^9*1/99
=1*1/99
=1/99 其中运用了公式 a^n*b^n=(ab)^n
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