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已知5m=3 ,25的n次方=11,求5的3m-2n次方的值
人气:304 ℃ 时间:2019-10-19 17:56:00
解答
5^(3m-2n)
=5^(3m)/5^(2n)
=(5^m)^3/(5^2)^n
=(5^m)^3/25^n
=3^3/12
=27/11
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