已知3^2m=6,3n=8,求3^4m-2n的值.
问题描述:
已知3^2m=6,3n=8,求3^4m-2n的值.
答
3^4m-2n
=3^4m÷3^2n
=(3^2m)^2÷(3^n)^2
=6^2÷8^2
=9/16