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OpenStudy (anonymous):
if it asks you to find the sum S of the series how do you solve it?
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OpenStudy (anonymous):
\[\sum_{n=1}^{\infty} {7^nx^{2n} \over 8^{n+1}}\]
OpenStudy (anonymous):
I thought it would just be 7x^2 /64 cause the next term gets very small but it's not the right answer..
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