Series expression for inverse hyperbolic function

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SUMMARY

The forum discussion centers on proving the series expression for the inverse hyperbolic function, specifically the equation \(\sum_{n=1}^{\infty} n e^{-n x} = \frac{1}{4}\sinh^{-2} \frac{x}{2}\). The user initially confused the inverse hyperbolic function with the hyperbolic sine function but clarified that they utilized the geometric series to establish the relationship. The discussion highlights the importance of understanding the properties of hyperbolic functions in mathematical proofs.

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  • Familiarity with series summation techniques
  • Knowledge of the geometric series and its applications
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gdumont
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Hi,

I'm trying to find a way to prove that
[tex] \sum_{n=1}^{\infty} n e^{-n x} = \frac{1}{4}\sinh^{-2} \frac{x}{2}[/tex]
Any help greatly appreciated
 
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Do you know the sum of the geometric series ?
 
I realized that it was the [itex]\sinh x[/itex] function and not the inverse function. And yes I used the geometric series to show the relation. Thanks anyways!
 

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