Question

Determine the 2term of ap whose 6 term is 12 and 8 is 22

Answer 1

a+d=?
a+5d=12
a+7d=22
by elimination method we get
a+5d=12
a+7d=22
- - -
_______
-2d=-10

d=5
putting the value of d in equation 1 we get
a+5(5)=12
a=12-25
a=-13
a+d=5+(-13)
=-8