question_answer

If \[\frac{{{2}^{3n}}}{8}+1+3\times \frac{{{2}^{n}}}{2}+3\times \frac{{{2}^{2n}}}{4}=729,\] then find the value of n.

A)  3                                

B)  4

C)  5                                

D)  6

E)  None of these