Question

If an 3n+1 is the nth term of a arithmetic progression then the 3rd term is A. 9 B. 28 C. 4 D. 10​

Answer 1

Step-by-step explanation:

put a=3

$\tt a_n=3n+1$

$\tt a_3=3×3+1$

$\tt =9+1$

$\tt =10$