question_answer

In an A.P., the sum of its first n terms is \[\frac{\mathbf{5}{{\mathbf{n}}^{\mathbf{2}}}}{\mathbf{3}}\mathbf{+}\frac{\mathbf{13n}}{\mathbf{5}}\]. Find its \[{{\mathbf{n}}^{\mathbf{th}}}\]terms.

A) \[\frac{50n-14}{15}\]     

B) \[\frac{50n+14}{15}\]   

C) \[\frac{64(2n-1)}{15}\]               

D)                    \[\frac{64(2n+1)}{15}\]

E) None of these