for what value of k are the numbers x,2x+k and 3x+6 three consecutive terms of an AP?
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A2-a1=a3-a2
2x+k-x=3x+6-2x-k
X+k=x+6-k
2k=6
K=3
2x+k-x=3x+6-2x-k
X+k=x+6-k
2k=6
K=3
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