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3 的m次方=6,9的n次方=2,求3的2m-4n+1次方的值
人气:115 ℃ 时间:2019-08-20 14:10:13
解答
3^(2m-4n+1)
=3^2m÷3^4n*3
=(3^m)^2÷(3^2n)^2*3
=(3^m)^2÷(9^n)^2*3
=6^2÷2^2*3
=36÷4*3
=9*3
=27
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