What is the coefficients of x^8 y^9 in the expansion of (3x + 2y)^17?
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Originally Posted by lkrb What is the coefficients of x^8 y^9 in the expansion of (3x + 2y)^17? Just use the binomial theorem.
Originally Posted by lkrb What is the coefficients of x^8 y^9 in the expansion of (3x + 2y)^17? Originally Posted by janvdl Just use the binomial theorem. correct. to be more specific. the formula for binomial expansion is: though i much prefer it in the order (it's exactly the same thing) of Here you have and , and you want the term given by (using the second formula)
Just like guys here mentioned... you use binomial theorem. So your final answer would be [17! / (8! * 9!)] * (3^8) (2^9).
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