Question

If K ‐ 1, K+3 and 3K ‐ 1 are in Ap,then find the value of K​

Answer 1

They are in Ap so

2(k + 3) = k -1 + 3k -1

2k + 6 = 4k -2

2k - 4k = -2 -6

-2k = -8

k = 4

Answer 2

Answer:

K = 4

Step-by-step explanation:

If the numbers are in AP then,

2(K + 3) = K - 1 + 3K - 1

=> 2K + 6 = 4K - 2

=> 2K = 8

=> K = 4

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