Changes

==Concept # 3 Permutations==

==Concept # 3 Permutations==

===Learning objectives===

===Learning objectives===

*State that permutation is an arrangement and write the meaning of <math>{^{n}}P_{r}</math>

*Sudents should be able to state that permutation is an arrangement and write the meaning of <math>{^{n}}P_{r}</math>

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*State that <math>{^{n}}P_{r}</math>=<math>\frac{n!}{(n-r)!}</math> and apply this to solve problems

*Sudents should be able to state that <math>{^{n}}P_{r}</math>=<math>\frac{n!}{(n-r)!}</math> and apply this to solve problems

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*Show that

*Sudents should be able to show that

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#<math>{(n+1)^{n}}P_{n}</math>=<math>{^{n+1}}P_{n}</math>

#<math>{(n+1)^{n}}P_{n}</math>=<math>{^{n+1}}P_{n}</math>