CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.2 Question 4
4. Which term of the AP: 3, 8, 13, 18, … is 78?
Solution:
Here, First term =
Common difference = d =
Using formula
, to find nth term of arithmetic progression, we get
, {We want to find value of
here.}
It means 16th term of the given AP is equal to 78.
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