Question

Сократите дробь
$frac{10*2 ^{n}}{ 2^{n+1}+ 2^{n-1} }$

Answer 1

$frac{10* 2^{n} }{ 2^{n} (2+frac{1}{2})} = frac{10}{ frac{5}{2} } = frac{10*2}{5} = frac{20}{5} =4$