Question

The nth term of an AP is (3n+1). the sum of its first n terms is​

Answer 1

Answer:

I hope the answer helps you.

Step-by-step explanation:

To find the series, we will plug in numbers in the above expression.

For n = 1, 3n + 1 = 3

     n = 2, 3n + 1 = 6

     n = 3, 3n + 1 = 9