#1442 · Algebra · Sequences & series

Binomial expansion with negative integer power

Expand the expression $(1 + \frac{1}{2} a)^{- 4}$ up to 4 terms in ascending powers of $a$ .

~5 minAnswer checked instantlyBinomial TheoremSeries Expansion

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XIV. Binomial Theorem: Any Index, Examples XIV.a, No. 10

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