Prove that if n and k are integers with 1 ¤ k ¤ n, then a) Using
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a) Using a combinatorial proof.
b) Using an algebraic proof based on the formula for (nr) given in Theorem 2 in Section 6.3.
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a We show that each side counts the number of ways to choose fro...View the full answer
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Related Book For 
Discrete Mathematics and Its Applications
ISBN: 978-0073383095
7th edition
Authors: Kenneth H. Rosen
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