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  1. D

    Binomial Theorem Question

    Terribly sorry it is meant to be (1+3x+ax^2)^n
  2. D

    Binomial Theorem Question

    Can someone please help me with this question for binomial theorem: In the expansion of (1+3x+ax2)n, where n is a positive integer, the coefficient of x2 is 0. Find in terms of n, the value of: (a) a (b) the coefficient of x Thanks :spin: :smile:
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