已知2的3m次方=4,b的2n次方=5,求(a的2m次方)的3次方+(b的n次方)的3次方-(a的2m次

问题描述:

已知2的3m次方=4,b的2n次方=5,求(a的2m次方)的3次方+(b的n次方)的3次方-(a的2m次

你这题出的有问题啊 已知应该是a的3m次方吧

a的3m次方=4 (a^m)^3=4 a^m=4^(1/3)
b^2n=5 (b^n)^2=5 b^n=5^(1/2)
(a的2m次方)的3次方+(b的n次方)的3次方-(a的2m次
=a^6m+b^3n-a^2m
=(a^m)^6+(b^n)^3-(a^m)^2
=4^(6*1/3)+5^(3*1/2)-4^(2*1/3)
=4^2+5^(3/2)-4^(2/3)
=16+5√5-2*2开3方
希望能帮到你,祝学习进步O(∩_∩)O

a^3m=4.b^2n=5
(a^2m)^3=(a^3m)^2=4^2=16
(b^n)^3=(b^2n)^(3/2)=5√5
a^2m=(a^3m)^(2/3)=4^(2/3)
(a的2m次方)的3次方+(b的n次方)的3次方-a的2m次方
=16+5√5-4^(2/3)