3的-2次幂乘以81的4分之3次幂
问题描述:
3的-2次幂乘以81的4分之3次幂
答
3^(-2)*(3^4)^(3/4)
=3^(-2)*3^(4*3/4)
=3^(-2)*(3^3)
=3^(-2*3)
=3^(-6)
=1/729