Question

find the fourth term of AP whose third term is 53/2 and common difference is 7/2 ​

Answer 1

Answer:

i can give you other example

Given a=21     a8=617

now a8=a+7d

617=21+7d

617−21=7d

7d=617−3=614

[d=31] where d is common difference

now a4=a+3d=21+3×31=1+21

[a4=23]