Question

Tell me the answer of 10th question

Answer 1

Hello

if a, b, c are in AP then
b - a = c - b
2b = a + b

Using the above identity.
2(6k - 2) = 8k+ 4 + 2k+ 12
12k -4 = 10k + 16
2k =20
k =10.

Hope it helps.