question_answer

Find the sum of n terms of the series whose \[{{n}^{th}}\] term is 3n - 2.

A) \[\frac{n}{2}(3n-1)\]    

B) \[\frac{n}{2}(3n+1)\]    

C) \[\frac{n}{2}(3n-3)\]      

D) \[\frac{n}{2}(2n-1)\]

E) None of these