已知2^m=5,2^n=3,求①2^m-n,②2^2m-3n
1个回答
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
相关问题
已知m-2n/2m+n=5,求代数式3(m-2n)/2m+n-15(2m+n)/m-2n-2
已知|2m-5|+(2m-5n+20)^2=0,求(-2m^2)-2m(5n-2m)+3n(6m-5n)-3n(4m-5
已知 |2m-5|+(2m-5n+20)的平方=0 求-2m²-2m(5n-2m)+3n(6m-5n)-3n(
已知2m+n=3,求m^2/m^2+n^2 + n^2/n^2-m^2
已知3m+n=0求n^2/n^2+m^2+m^2/m^2-n^2
已知m-2n/2m+n=3,求代数式2(m-2n)/2m+n-(m-2n)/2m+n-3的值为
已知3m-5n=0求m/m+n+m/m-n-m^2/m^2-n^2的值
已知2m+n分之m-2n=3,求代数式2m+n分之3m-6n减3(2m+n)分之m-2n-m-2n分之5(2m+n)
已知|m-2|+(n+[1/5])2=0,求m-(m2n+3m-4n)+3(2nm2-3n)的值.
已知|m-2|+(n+[1/5])2=0,求m-(m2n+3m-4n)+3(2nm2-3n)的值.