Question

In an AP, if d=-4, n=7 and last term=4, then a is

Answer 1

Answer:

a= -1/6.

Step-by-step explanation:

To find 'a' we need to use this formula:  l=a(n-1)d.

given, d= -4 ;  last term (l) =4 ; no.of terms (n) = 7

Therefore by substituting,

l=a(n -1)d

4=a(7-1)(-4)

4=a(6)(-4).

4= -24a

a= -4/24

a= -1/6.

Hope it helps you:)