Question

利用因式分解计算：[2^(n+4)-2*2^n]/[2*2^(n+3)]

Answer 1

[2^(n+4)-2*2^n]/[2*2^(n+3)]

=(16*2^n-2*2^n)/(2*8*2^n)

=2^n(16-2)/(16*2^n)

=14/16

=7/8