1.已知2^m-n=a,2^n=b,则2^m=多少【过程】
2.2^m=3,2^n=5,则2^(2m+3n)=多少【过程】
第1个回答 2014-10-31
1:2^m-n=a,2^n=b
2^m/2^n=a
则2^m=ab
2:2^m=3,2^n=5
2^(2m十3n)
=(2^m)^2*(2^n)^3
=9×125
=1125
2^m/2^n=a
则2^m=ab
2:2^m=3,2^n=5
2^(2m十3n)
=(2^m)^2*(2^n)^3
=9×125
=1125
第2个回答 推荐于2016-11-27
2^m/2^n=a
2^n=b
2^m=ab
=2^2m*2^3n
=(2^m)^2*(2^n)^3
=3^2*5^3
=1125