CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.2 Question 5
5. Find the number of terms in each of the following APs:
(i)
(ii)
Solution (i)
First term = a =7
Common difference = d = 13 – 7 = 19 – 13 = 6
Using formula
, to find nth term of arithmetic progression, we get
Therefore, there are 34 terms in the given arithmetic progression.
Solution (ii)
First term = a =18
Common difference = d =
Using formula
, to find nth term of arithmetic progression, we get
Therefore, there are 27 terms in the given arithmetic progression.
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