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Suma de la serie (lg)^n*x/n



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Solución

Ha introducido [src]
  oo           
____           
\   `          
 \       n     
  \   log (x)*x
  /   ---------
 /        n    
/___,          
n = 1          
$$\sum_{n=1}^{\infty} \frac{x \log{\left(x \right)}^{n}}{n}$$
Sum((log(x)^n*x)/n, (n, 1, oo))
Respuesta [src]
  //                         /      -1       \\
  ||-log(1 - log(x))  for And\x >= e  , x < E/|
  ||                                          |
  ||   oo                                     |
  || ____                                     |
  || \   `                                    |
x*|<  \       n                               |
  ||   \   log (x)                            |
  ||   /   -------           otherwise        |
  ||  /       n                               |
  || /___,                                    |
  || n = 1                                    |
  \\                                          /
$$x \left(\begin{cases} - \log{\left(1 - \log{\left(x \right)} \right)} & \text{for}\: x \geq e^{-1} \wedge x < e \\\sum_{n=1}^{\infty} \frac{\log{\left(x \right)}^{n}}{n} & \text{otherwise} \end{cases}\right)$$
x*Piecewise((-log(1 - log(x)), (x < E)∧(x >= exp(-1))), (Sum(log(x)^n/n, (n, 1, oo)), True))

    Ejemplos de hallazgo de la suma de la serie