Question

how to solve this problem ​

Answer 1

$\frac{4(3)^n}{3^{n+1}-3^n}\\\\=\frac{4(3)^n}{3.3^n-3^n}\\\\=\frac{4(3)^n}{3^n(3-1)}\\\\=\frac{4}{(3-1)}\\\\=\frac{4}{2}\\\\=2$

Option A is correct .