CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.2 Question 6
6. Check whether -150 is a term of the AP:
Let is the nth of AP which means that
Here, First term = a = 11
Common difference = d = 8 - 11 = -3
Using formula , to find nth term of arithmetic progression, we get
But, n cannot be in fraction. Therefore, our supposition is wrong. cannot be term in AP.