MathDB

B5

Part of 1967 Putnam

Problems(1)

Putnam 1967 B5

Source: Putnam 1967

5/14/2022
Show that the sum of the first nn terms in the binomial expansion of (2−1)−n(2-1)^{-n} is 12,\frac{1}{2}, where nn is a positive integer.
PutnamBinomialexpansion