Question

determine the AP whose third term is 4 and the 9th term is -
8

Answer 1

let a be first term and d be common difference

A3 = a+ 2d = 4
A9 = a+ 8 d = 8

-6d = -4
d= 2/3

a= 4 - 4/3
= 8/3

SO AP IS 8/3,10/3,4......