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已知3的M次方=6,9的N次方=2,则3的2M-4N+1=
人气:293 ℃ 时间:2019-08-15 17:36:18
解答
3^(2m-4n+1)
=[(3^m)^2/(3^n)^4]*3
=[(3^m)^2/(9^n)^2]*3
=6^2/(2^2)*3
=(36/4)*3
=108/4
=27
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