a^2=m,b^2=n,求(ab)^12
问题描述:
a^2=m,b^2=n,求(ab)^12
答
a^2=m,b^2=n,
a^2*b^2=mn
(ab)^2=mn
求(ab)^12
=[(ab)^2]^6
=(mn)^6
=m^6n^6