Friday
March 27, 2015

Homework Help: algebra

Posted by jadacess on Friday, February 8, 2008 at 11:51pm.

The sum of the swuares of the first n counting numbers:

1 + 2 + 3 + 4 + 5 + 6 + ... +n
is given by the formula

S = n(n+1)(2n+1)
------------
6
Find the sum of the squares of all the counting numbers between 15 and 35.


- answer is 12445;

how do you do this question ? ><

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