2^2m+n*16*8^m+(-4^m)*8^m

问题描述:

2^2m+n*16*8^m+(-4^m)*8^m

2^2m+n*16*8^m+(-4^m)*8^m
=4^m+n*4^2*4^(2m)-(4^m)*4*(2m)
=4^m(1+n*4^m+2)-4^(2m))