Evaluate the sum: https://webwork.math.lsu.edu/webwork...85db28b7e1.png

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- Mar 29th 2010, 06:48 PMtbenne3evaluate the sum
Evaluate the sum: https://webwork.math.lsu.edu/webwork...85db28b7e1.png

- Mar 29th 2010, 07:08 PMsimplependulum
Notice that

$\displaystyle \sum_{k=50}^{300} = \sum_{k=1}^{300 }- \sum_{k=1}^{49 }$

and $\displaystyle \sum_{k=1}^n k^3 = \frac{ (n(n+1))^2 }{4} $ - Mar 29th 2010, 07:14 PMtbenne3
- Mar 29th 2010, 07:48 PMmr fantastic
- Mar 29th 2010, 07:57 PMtbenne3
got it right nevermind