This is the basic and conceptual question from Chapter name- Arithmetic Progression
Chapter number- 9
Exercise 9.4
In this question we have been given an arithmetic progression. And we have to find its 9th term.
CBSE DHANPAT RAI publications
Class:- 10th
Understanding CBSE Mathematics
Question 1(vii)
Given that,
A. P is 3/4, 5/4, 7/4, 9/4, …………
First term (a) = 3/4,
Common difference (d) = Second term – first term
d = 5/4 – 3/4 = 2/4
As we know that, to find nth term in an A.P = a + (n – 1)d
Therefore, 9th term a9 = a + (9 – 1)d
= 3/4 + 16/4 = 19/4
Hence 9th term of the A.P is 19/4.