Question

if 7th term of AP is 20 and 13th term is 32 find the ap

Answer 1

Ap 8,10,12,14,16,18,20

7 term= a+6d=20
13term=a+12d=32
subtract the 2 equation from the first and then substitute the value

Answer 2

a7=20

a+6d=20___1
anda13=32
a+12d=32___2
from 1 and 2
12d-6d=32-20
6d=12
d=2

a=32-12×2
=8
ap: 8,10,12,14