已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n

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已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n2^m=52^n=3

已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n
已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n

已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n
2^m=5
2^n=3
(1) 2^(m-n)
=2^m/2^n
=5/3
(2) 2^(2m-3n)
=(2^m)²/(2^n)³
=5²/3³
=25/27