Q. 14.5( 70 Votes )

In an AP, if d =

Answer :

Given: d = - 4, n = 7 and an = 4


To find: The value of “a”.


Formula Used: nth term of an AP is:


an = a + (n - 1) d


Explanation:


As we know, nth term of an AP is


an = a + (n - 1) d


where a = first term


an is nth term


d is the common difference


4 = a + (7 - 1) (- 4 ) …..( Given Data )


4 = a - 24


a = 24 + 4 = 28


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