Question

for what value of K will k+9,2k-1 and 2k+7 be the consecutive terms of an Ap? if you answer correctly I will mark it as brainliest

Answer 1

I think K=-3

tell me if I am right

Answer 2

Given k+9 , 2k-1 , 2k+7are in ap
Then their common difference is same
so,
$(2k - 1) - (k + 9) = (2k + 7) - (2k - 1) \\ 2k - 1 - k - 9 = 2k + 7 - 2k + 1 \\ k - 10 = 8 \\ k = 8 + 10 \\ k = 18$
Hope it helps u
PLZ MARK IT BRAINLIEST