Q5 of 110 Page 41

Find the 17th term of the A.P. 4, 9, 14 …

Given A.P. 4, 9, 14 …


Here, first term, a = 4


We know that common difference, d = a1 – a.


∴ d = 9 - 4 = 5


We know that nth term of A.P. , tn = a + (n – 1) d.


⇒ t17 = 4 + (17 – 1) (5)


= 4 + 16 (5)


= 4 + 80


= 84


∴ 17th term of A.P. i.e. t17 = 84


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