Consider the numerical pyramid below, formed by simply putting down the series of odd numbers into a pyramid.
1
3 5
7 9 11
13 15 17 19
. . .
Find a formula for the sum of the numbers in the nth row, and prove it.
(In reply to
Solution by ethan)
Duh! that my first comment was pretty stupid of me. Here I am, trying to think of the perfect way to word my solution, and I end up forgetting to simplify n²*n to n³
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Posted by ethan
on 2003-10-14 16:29:21 |