This is arithmetic progression based question from Chapter name- Arithmetic Progression

Chapter number- 9

Exercise – 9.4

In this question we have been given the arithmetic progression. Also we have to find the nth term of this progression

CBSE DHANPAT RAI PUBLICATIONS

Understanding CBSE Mathematics

Class :- 10th

Question no 1(iii)

Given that,

A. P. is 13, 8, 3, – 2, …………

First term (a) = 13,

Common difference (d) = Second term first term

d = 8 – 13 = – 5

As we know that, to find nth term in an A.P = a + (n – 1)d

= 13 + (n – 1) – 5 = 13 – 5n + 5

Hence nth term of the A.P is an = 18 – 5n