If any three successive coefficients in the expansion of are 36, 84 and 126. find n

I dont know how to begin this problem should i do a series of what ???

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- January 6th 2010, 01:14 AMTomJerryCoefficient problem
If any three successive coefficients in the expansion of are 36, 84 and 126. find n

I dont know how to begin this problem should i do a series of what ??? - January 6th 2010, 01:48 AMProve It