Prove n r=0 (1)r n r = 0 and n r=0 n r = 2n. Hint: Consider (1 1)n and (1 + 1)n, or use
Chapter 1, Problem 1.2-12(choose chapter or problem)
Prove n r=0 (1)r n r = 0 and n r=0 n r = 2n. Hint: Consider (1 1)n and (1 + 1)n, or use Pascals equation and proof by induction.
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