Prove the statement for positive integers n and r, with r n. P(n, n) = n!

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Prove the statement for positive integers n and r, with r ≤ n.

P(n, n) = n!

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College Algebra

ISBN: 978-0134697024

12th edition

Authors: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels

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