Question

(c) Let a and d be the first term and common
difference of the given A.P.
Then,
a4=8 and a6=14​

Answer 1

Step-by-step explanation:

a+3d = 8 --1)

a+5d= 14 ---2)

by subtracting 1 from 2 we get

-2d= -6

d= 3

putting d = 3 in 1 we get

a+ 3(3) = 8

a+9 = 8 and a = 8-9 = -1

so a = -1 and d = 3