Question

for what value of k will k+9, 2k-1 and 2k+7 are the consecutive terms of an A.P?

Answer 1

Answer:

Step-by-step explanation:if all are consecutive terms of an ap then (k+9)+(2k+7)=2(2k-1) as the middle term is arithmetic mean of the two terms preceding it and succeding it, and solving the equation you get k=18