Find the nth term for the given n — task. Maths CBSE Live product, Class 10 (2026-27).

If the sum of the first \(n\) terms of an AP is

\frac{1}{2} [{3 n}^{2} + 7 n]

, then find its

n^{th}

term. Hence, write its

21^{st}

term.

Did you find an error?

6. Find the nth term for the given n