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.
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
Putting (2) and (3) in equation (1), we get