http://www.wolframalpha.com/input/?i=(k+1)!(k+2)+-1(adsbygoogle = window.adsbygoogle || []).push({});

Could anyone explain how you get from (k+1)!(k+2) - 1 to (k+2)! - 1

step by step please, here is my attempts:

(k+1)k!(k+2) - 1

(k+1)(k+2)k! - 1

(k+1)(k+2)! -1

no idea where to go from here

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# Homework Help: Algebra problem ordinary numbers

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