Question

已知2^m=5,2^n=3,求2^3m-2n的值

Answer 1

2^3m-2n
=(2^m)^3/(2^n)^2
=5^3/3^2
=125/9

Answer 2

您好！
2^(3m-2n)
=2^（3m）/2^（2n）
=(2^m)^3/(2^n)2
将2^m=5、2^n=3代入
=（2^m）^3/(2^n)2
=5^3/3^2
=125/9
希望能帮到你，谢谢采纳！