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Math Help - Coefficient problem

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    Coefficient problem

    If any three successive coefficients in the expansion of (1+x)^n 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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  2. #2
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    Quote Originally Posted by TomJerry View Post
    If any three successive coefficients in the expansion of (1+x)^n are 36, 84 and 126. find n


    I dont know how to begin this problem should i do a series of what ???
    Draw Pascal's Triangle and see which row those three numbers appear in.
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