Question 635778
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You can't do better than perfect.  Good job.


The only thing I might have done differently would be to express the first one as:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ ^{26}P_4\ =\ \frac{26!}{(26\,-\,4)!}\ =\ \frac{26!}{22!}]


and then show your arithmetic, just to demonstrate that I really know what is going on.  The second one is:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ ^{26}C_4\ =\ {{26}\choose{4}}\ =\ \frac{26!}{4!(26\,-\,4)!}]


if you want to get fancy on that one also.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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