#1404 · Algebra · Polynomials

Coefficient of a power in expansion

Find the coefficient of $x^{18}$ in $(x^{2} + \frac{3 a}{x})^{15}$ .

~8 minAnswer checked instantlyBinomial TheoremGeneral Term

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XIII. Binomial Theorem: Positive Integral Index, Examples XIII.a, No. 27

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