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OpenStudy (anonymous):
Help with series~~~~
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OpenStudy (anonymous):
\[\sum_{n=1}^{10}a^n+nb\]
OpenStudy (anonymous):
wheres the problem
OpenStudy (dumbcow):
\[= \sum_{1}^{10}a^{n} + b \sum_{1}^{10}n\] \[= \frac{a(a^{10}-1)}{a-1} + b(\frac{10(10+1)}{2})\]
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