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