o l m . v n
A = 3 + 32 + 33 + ... + 32016
=> 3A = 3 ( 3 + 32 + 33 + ... + 32016 )
= 32 + 33 + 34 + ... + 32017
3A - A = ( 32 + 33 + 34 + ... + 32017 ) - ( 3 + 32 + 33 + ... + 32016 )
2A = 32017 - 3
\(\Rightarrow2A+3=3^{2017}-3+3=3^{2017}=3^n\)
=> n = 2017