Question

If 2, 3k-1,8, are in ap then find the value of k

Answer 1

Since they are a in AP,
2×(3k-1) = 2+8
3k-1 = 5
k = 2

Answer 2

I hope this will help u ..
We had just compare a2-a1 and a3-a2
a2-a1=a3-a2