Question 993938
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Re: part c.


The number of exposed bumps on the nth level is 8n.  Hence the total number of exposed bumps on an *[tex \Large n]-level pyramid is:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 8\sum_{k=1}^n\, k]


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

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \