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OpenStudy (anonymous):
The nth pyramidal number tells how many balls there are in a pyramidal stack that is n layers tall. What kind of pyramid is the stack?
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OpenStudy (anonymous):
A. A golden pyramid B. A Fibonacci pyramid C. A five-sided pyramid D. A four-sided pyramid E. A three-sided pyramid
OpenStudy (anonymous):
i think it is D. not sure tho
OpenStudy (anonymous):
I think it might be E...
OpenStudy (anonymous):
No, you are right, E it is...
OpenStudy (anonymous):
D I mean:-)
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OpenStudy (anonymous):
Actually D or E or C
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