Nevermind
Last edited by EdenM; Aug 6th 2009 at 07:41 PM.
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Originally Posted by EdenM If anyone can help me understand out to do this problem: Find a formula for the sum x^{k}+x^{k+1}+x^{k+2}+⋯+x^264 It would be a huge help as I cant figure it out and its been days. Thanks It's equal to $\displaystyle (1 + x + x^2 + .... + x^{264}) - (1 + x + x^2 + .... + x^{k-1})$ and you have a geometric series in each bracket ....
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