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Find the coefficient of the term that has?
a^9b^8 in the expansion of (a-2b^2)^13
1 Answer
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- harryLv 71 decade agoFavorite Answer
(a-2b^2)^13
Según el triángulo de Tartaglia los coeficientes del binomio de grado 13 son
1, 13, 78, 286, 715, 1287, 1716, 1716, 1287, 715, 286, 78, 13, 1
a^9 ----> 715*a^9*(2b^2)^4 = 715*2^4*a^9*b^8
coeficiente = 715*2^4 = 11440 <---------
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