In an AP, if d = –4, n = 7, a n = 4, then a is

Question

sent quick its from ap

Answer 1

In arthemetic sequence a n = a+(n-1)d

a is first term and d is common difference.

Here n =7,d = -4

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

4 = a+6(-4)

4 =a-24

Add 24 to each side.

4+24 = a-24+24

28 = a

So a =28