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CBSE Class 10 Answered

which term of the AP 3,8,13,18.....is. 78?
Asked by durgauikey7000 | 08 Dec, 2023, 08:16: PM
answered-by-expert Expert Answer

Given Arithmetic progression (A.P. ) is

3, 8, 13, 18 .......................

First term a = 3 ;

Common difference d = 5 ;

nth term of A.P is

img

Hence if nth term is 78 , then we have

78 = 3 + (n-1) 5

from above expression , we get n = 16

Hence 78 is 16th term

Answered by Thiyagarajan K | 08 Dec, 2023, 09:29: PM

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