Question

11) For what value of K, will + 9, 2 − 1 2 + 7 are the consecutive terms of an A.P. ?​

Answer 1

Answer:

k = 18

Step-by-step explanation:

Since a + c = 2b

(k + 9) + (2k + 7) = 2(2k - 1)

k + 9 + 2k + 7 = 4k - 2

3k + 16 = 4k - 2

3k - 4k = - 2 - 16

-k = - (2 + 16)

k = 18