Friday, 28 August 2015

Sum of the series frac25cdot10+frac2cdot65cdot10cdot15+frac2cdot6cdot105cdot10cdot15cdot20+cdots

How do I find the sum of the following infinite series:
2510+2651015+26105101520+
I think the sum can be converted to definite integral and calculated but I don't know how to proceed from there.

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