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Suma de la serie ((x-2)^(n+1))/((n+1)3^(n+1))



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Solución

Ha introducido [src]
  oo                
____                
\   `               
 \            n + 1 
  \    (x - 2)      
   )  --------------
  /            n + 1
 /    (n + 1)*3     
/___,               
n = 1               
$$\sum_{n=1}^{\infty} \frac{\left(x - 2\right)^{n + 1}}{3^{n + 1} \left(n + 1\right)}$$
Sum((x - 2)^(n + 1)/(((n + 1)*3^(n + 1))), (n, 1, oo))
Respuesta [src]
    //          /                 /5   x\\                         \     //          /                 /5   x\\                         \
    ||          |            2*log|- - -||                         |     ||          |            2*log|- - -||                         |
    ||/  1   x\ |     2           \3   3/|                         |     ||/  1   x\ |     2           \3   3/|                         |
    |||- - + -|*|- ------- - ------------|  for And(x >= -1, x < 5)|     |||- - + -|*|- ------- - ------------|  for And(x >= -1, x < 5)|
    ||\  3   6/ |    2   x             2 |                         |     ||\  3   6/ |    2   x             2 |                         |
    ||          |  - - + -    /  2   x\  |                         |     ||          |  - - + -    /  2   x\  |                         |
    ||          |    3   3    |- - + -|  |                         |     ||          |    3   3    |- - + -|  |                         |
    ||          \             \  3   3/  /                         |     ||          \             \  3   3/  /                         |
    ||                                                             |     ||                                                             |
  2*|<          oo                                                 |   x*|<          oo                                                 |
    ||        ____                                                 |     ||        ____                                                 |
    ||        \   `                                                |     ||        \   `                                                |
    ||         \     -n         n                                  |     ||         \     -n         n                                  |
    ||          \   3  *(-2 + x)                                   |     ||          \   3  *(-2 + x)                                   |
    ||          /   -------------                  otherwise       |     ||          /   -------------                  otherwise       |
    ||         /        1 + n                                      |     ||         /        1 + n                                      |
    ||        /___,                                                |     ||        /___,                                                |
    ||        n = 1                                                |     ||        n = 1                                                |
    \\                                                             /     \\                                                             /
- ------------------------------------------------------------------ + ------------------------------------------------------------------
                                  3                                                                    3                                 
$$\frac{x \left(\begin{cases} \left(\frac{x}{6} - \frac{1}{3}\right) \left(- \frac{2}{\frac{x}{3} - \frac{2}{3}} - \frac{2 \log{\left(\frac{5}{3} - \frac{x}{3} \right)}}{\left(\frac{x}{3} - \frac{2}{3}\right)^{2}}\right) & \text{for}\: x \geq -1 \wedge x < 5 \\\sum_{n=1}^{\infty} \frac{3^{- n} \left(x - 2\right)^{n}}{n + 1} & \text{otherwise} \end{cases}\right)}{3} - \frac{2 \left(\begin{cases} \left(\frac{x}{6} - \frac{1}{3}\right) \left(- \frac{2}{\frac{x}{3} - \frac{2}{3}} - \frac{2 \log{\left(\frac{5}{3} - \frac{x}{3} \right)}}{\left(\frac{x}{3} - \frac{2}{3}\right)^{2}}\right) & \text{for}\: x \geq -1 \wedge x < 5 \\\sum_{n=1}^{\infty} \frac{3^{- n} \left(x - 2\right)^{n}}{n + 1} & \text{otherwise} \end{cases}\right)}{3}$$
-2*Piecewise(((-1/3 + x/6)*(-2/(-2/3 + x/3) - 2*log(5/3 - x/3)/(-2/3 + x/3)^2), (x >= -1)∧(x < 5)), (Sum(3^(-n)*(-2 + x)^n/(1 + n), (n, 1, oo)), True))/3 + x*Piecewise(((-1/3 + x/6)*(-2/(-2/3 + x/3) - 2*log(5/3 - x/3)/(-2/3 + x/3)^2), (x >= -1)∧(x < 5)), (Sum(3^(-n)*(-2 + x)^n/(1 + n), (n, 1, oo)), True))/3

    Ejemplos de hallazgo de la suma de la serie