Question

$\frac{{2}^{n + 1} + {2}^{n + 2} }{ {2}^{n + 3} }$

Answer 1

$\frac{2^{n+1}+2^{n+2}}{2^{n+3}}= \frac{2^n2^1+2^n2^2 }{2^n2^3}= \frac{2^n[2^1+2^2]}{2^n[2^3] }= \frac{2^1+2^2}{2^3 }= \frac{2+4}{8}= \frac{6}{8}= \frac{3}{4}$