Question

In an AP,Fourth and sixth terms are 8 and 14 respectively.Find the first terms ​

Answer 1

Step-by-step explanation:

Let the first term be taken as a

Given :4th term :a+3d=8------(1)

:6th term:a+5d=14-----(2)

Eq(2)-(1)=. a+3d=8

- a+5d=14

___________

- 2d=-6

-2d=-6

d=-6/-2=3

Substituting the value of d in eq (1)=

a+3d=8

a+3*3=8

a+9=8

a=8-9=-1

Hence first term a=-1