Sum
Find the value of p, if x, 2x + p and 3x + 6 are in A.P
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Solution
Since x, 2x + p and 3x + 6 are in A.P, we have
(2x + p) - x = (3x + 6) - (2x + p)
=> 2x + p - x = 3x + 6 - 2x - p
`=> p + p = x - x + 6`
=> 2p = 6
=> p = 3
Concept: Arithmetic Progression - Finding Their General Term
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