a的m次方=8,a的n次方=1÷2,则a的2m+3n次方等于多少?
问题描述：
a的m次方=8,a的n次方=1÷2,则a的2m+3n次方等于多少?
答
a^m=8,a^n=1/2
a^(2m+3n)
=a^2m+a^3n
=(a^m)^2+(a^n)^3
=8^2*(1/2)^3
=64*(1/8)
=8
答
a^m=8;a^n=1/2;
a^(2m+3n)=a^2m*a^3n
=(a^m)^2*(a^n)^3
=8*8*(1/2)*(1/2)*(1/2)
=8
答
a的2m+3n次方
=a的2m次方×a的3n次方
=﹙a的m次方﹚²×﹙a的n次方﹚³
=8×8×½×½×½
=8