Question

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

Answer 1

Common difference = 2k-1-(k+9)=2k+7-(2k-1)
2k-1-k-9=2k+7-2k+1
k-10=8
k=10+8=18
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