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