SOLUTION: If the coefficient of 2nd,3rd and 4th terms in the expansion of (1+x)^n are in A.P, then what is the value of n?

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Question 1089211: If the coefficient of 2nd,3rd and 4th terms in the expansion of (1+x)^n are in A.P, then what is the value of n?
Answer by ikleyn(52914) About Me  (Show Source):
You can put this solution on YOUR website!
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HINT.  If the numbers a, b and c form an AP, then  b = %28a%2Bc%29%2F2.