Question

In an AP if d=-4, n=7, l=4, then a is _______.​

Answer 1

$\blue{Data:}$

d = - 4

n = 7

l = an = 4

$\green{To\: find:}$

a = ?

$\red{Calculation :}$

an = a + (n - 1 ) d

4 = a + ( 7 - 1 ) - 4

4 = a + (6) - 4

4 = a - 24

4 + 24 = a

28 = a