Question

3+8+13+18+......sum of the 8 terms of this A.P is​

Answer 1

Here, First term a=3 and common difference d=5

Now,

t

n

=a+(n−1)d

⇒t

n

=3+(n−1)×5

⇒t

n

=3+5n−5

⇒t

n

=5n−2

Hope it helps.....