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Suma de la serie ln^n(2x+1)/2^n



=

Solución

Ha introducido [src]
  oo               
____               
\   `              
 \       n         
  \   log (2*x + 1)
   )  -------------
  /          n     
 /          2      
/___,              
n = 1              
$$\sum_{n=1}^{\infty} \frac{\log{\left(2 x + 1 \right)}^{n}}{2^{n}}$$
Sum(log(2*x + 1)^n/2^n, (n, 1, oo))
Respuesta [src]
/     log(1 + 2*x)            |log(1 + 2*x)|    
| --------------------    for -------------- < 1
|   /    log(1 + 2*x)\              2           
| 2*|1 - ------------|                          
|   \         2      /                          
|                                               
<  oo                                           
| ___                                           
| \  `                                          
|  \    -n    n                                 
|  /   2  *log (1 + 2*x)        otherwise       
| /__,                                          
\n = 1                                          
$$\begin{cases} \frac{\log{\left(2 x + 1 \right)}}{2 \left(1 - \frac{\log{\left(2 x + 1 \right)}}{2}\right)} & \text{for}\: \frac{\left|{\log{\left(2 x + 1 \right)}}\right|}{2} < 1 \\\sum_{n=1}^{\infty} 2^{- n} \log{\left(2 x + 1 \right)}^{n} & \text{otherwise} \end{cases}$$
Piecewise((log(1 + 2*x)/(2*(1 - log(1 + 2*x)/2)), Abs(log(1 + 2*x))/2 < 1), (Sum(2^(-n)*log(1 + 2*x)^n, (n, 1, oo)), True))

    Ejemplos de hallazgo de la suma de la serie