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Mathematics, 11.12.2019 20:31 TheOneandOnly003

Using the binomial theorem to find coefficients in binomials. about
(a) what is the coefficient of x3y4 in (-3x + 4y)7?
(b) what is the coefficient of x2y7 in (5x - y)9?
(c) what is the coefficient of x5y3 in (3x - 4y)8?
(d) what is the coefficient of x6y1 in (-2x - 5y)7?

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Using the binomial theorem to find coefficients in binomials. about
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