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#1545 · Combinatorics · Binomial coefficients

Coefficient of x^8 in quartic expansion

Find the coefficient of in the expansion of .

~8 minAnswer checked instantlyMultinomial theoremSeries expansion

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XV. Multinomial Theorem, Examples XV, No. 8

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).