In an AP, if d = - 4, n = 7 and a_n = 4, then a is equal to

As we know, nth term of an AP is

a_{n =} a + (n - 1)d

where a = first term

a_n is nth term

d is the common difference

4 = a + (7 - 1)(- 4) …..(Given Data)

4 = a - 24

a = 24 + 4 = 28