化简2的n+4次方-2n除以2×2的n+3次方
问题描述：
化简2的n+4次方-2n除以2×2的n+3次方
答
2^(n+4)-2^n/[2*2^(n+3)]
=(16*2^n-2^n)/(2*8*2^n)
=15*2^n/16*2^n
=15/16