2的m次方+2的m次方*3*2的m+1次方

问题描述:

2的m次方+2的m次方*3*2的m+1次方

2^m+2^m×3×2^(m+1)
=2^m(1+3×2)
=7×2^m不对吧2^m+2^m×3×2^(m+1)=2^m+2^(2m)×3×2=2^m+6×2^(2m)