Question

if 3+k,18_k,5k+1are in A.P .then find k​

Answer 1

Answer:

I hope u r satisfied this answer

Answer 2

a= 3 + k

d = 18 - k - ( 3 - k )

18 - k - 3 + k

- k + k is cut ( because - - (+) + - (-) become - k + k is cut

18 - 3

= 15

T

3 = a + ( n - 1 ) a

3 + k + ( 3 - 1 ) × 15

5 k + 1 = 3 + k + 30

5 k - k = 3 + 30 - 1

4 k = 32 k = 32 / 4

= 8