question_answer

Find the value of \[\frac{{{3}^{n+1}}-{{3}^{n}}}{{{3}^{n+2}}-{{3}^{n+1}}}\]

A) \[\frac{3}{2}\]              

B) \[\frac{2}{3}\]

C) 3                     

D) \[\frac{1}{3}\]

E) None of these