Q. 104.7( 14 Votes )

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

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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