Question

Ans the question plzz.

Answer 1

let first term be a

Difference be d

7th term=a+6d,2nd term=a+d

Given a+6d=4(a+d)

2d=3a

12th term=a+11d,4th term=a+3d

Given a+11d=a+3d+2

8d=2

d=1/4

a=2d/3=1/6