Prove the identity C) G) = G) (:::Z), whenever n, r, and k
Chapter 5, Problem 5.4.22(choose chapter or problem)
Prove the identity C) G) = G) (:::Z), whenever n, r, and k are nonnegative integers with r ::s n and k ::s r, a) using a combinatorial argument. b) using an argument based on the formula for the number of r-combinations of a set with n elements.
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