CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.2 Question 10
10. The 17th term of an AP exceeds its 10th term by 7. Find the common difference.
Solution:
It is given that 17th term exceeds its 10th term by 7.
It means
=
+ 7 (1)
Here,
is the 17th term and
is the 10th term of an AP.
Using formula
, to find nth term of arithmetic progression, we get
(2)
(3)
Putting (2) and (3) in equation (1), we get
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