Q. 104.7( 14 Votes )

Which term of the AP 3, 8, 13, 18, ... is 88?

Answer :

In the given AP, the first term = a = 3

Common difference = d = 8 - 3 = 5


To find: place of the term 88.


So, let an = 88


Since, we know that


an = a + (n - 1) × d


88 = 3 + (n - 1) × 5


88 - 3 = 5n - 5


85 = 5n - 5


85 + 5 = 5n


5n = 90


n = 90/5


n = 18


18th term of the AP is 88.


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