Question

(1) Find the 15th term of the A.P. 3, 8, 13, 18, ....​

Answer 1

Answer:

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

Now,

tn =a+(n−1)d

⇒tn =3+(n−1)×5

⇒tn=3+5n−5

⇒tn =5n−2