Question

срочно решите пожалуйста!!

Answer 1

$\frac{15 ^{n} }{ 5^{n-2}* 3^{n+2} } = \frac{(5*3) ^{n} }{ 5^{n-2}* 3^{n+2} }= \frac{ 5^{n}* 3^{n} }{ 5^{n-2}* 3^{n+2} }= 5^{n-(n-2)}* 3^{n-(n+2)} =$$= 5^{n-n+2}* 3^{n-n-2}= 5^{2}* 3^{-2}=5* \frac{1}{9} = \frac{5}{9}$