CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.2 Question 6
6. Check whether -150 is a term of the AP:
Solution:
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.
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