Recall Proposition 13.2 that for all positive integers n we have 1 1 C 2 2 C C n n D .n
Chapter 21, Problem 21.6(choose chapter or problem)
Recall Proposition 13.2 that for all positive integers n we have 1 1 C 2 2 C C n n D .n C 1/ 1: Prove this using the techniques of this section.
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