Convergence and sum to infinity
Convergence and sum to infinity
3 marks
Tim Gan Math Original
For the series \(\sum_{r=1}^{\infty}\frac25\left(-\frac13\right)^{r-1}\), decide whether it converges. If it does, find its sum.[3]
Solution:
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Answer:converges to \(\frac3{10}\)
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