若2^m=3,4^n=8求2^3m-2n+3的值要过程

2025-05-20 04:32:17
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回答1:


2^m=3,4^n=8
∴2^2n=8
∴2^(3m-2n+3)
=2^3m÷2^2n×2^3
=(2^m)³÷8×8
=3³
=27