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[tex]1+\frac{n}{1!}+\frac{n(n-1)}{2!}+\frac{n(n-1)(n-2)}{3!}+...= 2^{n} [/tex]

This comes from proving that the power set of a set with n elements is [tex]2^{n}[/tex].

I got so far that nCn+nC(n-1)+ ... = what I have above. Now for the induction...

Cheers,

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# 2^n Induction

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