Question 1169156
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This is a place to get help with your math.  It is not a place to dump your entire homework assignment and get someone else to do it for you for free.  Hence the "One question per post" rule.  By the way, your question 1 has four parts -- that is four questions.

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

From <https://www.algebra.com/cgi-bin/upload-illustration.mpl> 
I > Ø
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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