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x+2/x+1+x-3/x-1=5/x^2-1 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
    2           3       5     
x + - + 1 + x - - - 1 = -- - 1
    x           x        2    
                        x     
$$\left(\left(x + \left(\left(x + \frac{2}{x}\right) + 1\right)\right) - \frac{3}{x}\right) - 1 = -1 + \frac{5}{x^{2}}$$
Gráfica
Suma y producto de raíces [src]
suma
                                     _______________     /             _______________                          \                                        _______________     /           _______________                          \                                                       
                                    /        ______      |            /        ______                           |                                       /        ______      |          /        ______                           |                                                       
                                   /  65   \/ 7473       |    ___    /  65   \/ 7473                            |                                      /  65   \/ 7473       |  ___    /  65   \/ 7473                            |              _______________                          
                                3 /   -- + --------      |  \/ 3 *3 /   -- + --------                ___        |                                   3 /   -- + --------      |\/ 3 *3 /   -- + --------                ___        |             /        ______                           
  1              7              \/    54      72         |        \/    54      72               7*\/ 3         |     1              7              \/    54      72         |      \/    54      72               7*\/ 3         |     1      /  65   \/ 7473                7           
- - - ----------------------- - -------------------- + I*|- -------------------------- + -----------------------| + - - - ----------------------- - -------------------- + I*|-------------------------- - -----------------------| + - - + 3 /   -- + --------  + -----------------------
  6           _______________            2               |              2                        _______________|     6           _______________            2               |            2                        _______________|     6   \/    54      72               _______________
             /        ______                             |                                      /        ______ |                /        ______                             |                                    /        ______ |                                       /        ______ 
            /  65   \/ 7473                              |                                     /  65   \/ 7473  |               /  65   \/ 7473                              |                                   /  65   \/ 7473  |                                      /  65   \/ 7473  
      72*3 /   -- + --------                             |                               72*3 /   -- + -------- |         72*3 /   -- + --------                             |                             72*3 /   -- + -------- |                                36*3 /   -- + -------- 
         \/    54      72                                \                                  \/    54      72    /            \/    54      72                                \                                \/    54      72    /                                   \/    54      72    
$$\left(- \frac{1}{6} + \frac{7}{36 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}\right) + \left(\left(- \frac{\sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} - \frac{1}{6} - \frac{7}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} + \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}\right)\right) + \left(- \frac{\sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} - \frac{1}{6} - \frac{7}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + i \left(- \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2}\right)\right)\right)$$
=
        /           _______________                          \     /             _______________                          \
        |          /        ______                           |     |            /        ______                           |
        |  ___    /  65   \/ 7473                            |     |    ___    /  65   \/ 7473                            |
        |\/ 3 *3 /   -- + --------                ___        |     |  \/ 3 *3 /   -- + --------                ___        |
  1     |      \/    54      72               7*\/ 3         |     |        \/    54      72               7*\/ 3         |
- - + I*|-------------------------- - -----------------------| + I*|- -------------------------- + -----------------------|
  2     |            2                        _______________|     |              2                        _______________|
        |                                    /        ______ |     |                                      /        ______ |
        |                                   /  65   \/ 7473  |     |                                     /  65   \/ 7473  |
        |                             72*3 /   -- + -------- |     |                               72*3 /   -- + -------- |
        \                                \/    54      72    /     \                                  \/    54      72    /
$$- \frac{1}{2} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} + \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}\right) + i \left(- \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2}\right)$$
producto
/                                     _______________     /             _______________                          \\ /                                     _______________     /           _______________                          \\                                                       
|                                    /        ______      |            /        ______                           || |                                    /        ______      |          /        ______                           ||                                                       
|                                   /  65   \/ 7473       |    ___    /  65   \/ 7473                            || |                                   /  65   \/ 7473       |  ___    /  65   \/ 7473                            || /           _______________                          \
|                                3 /   -- + --------      |  \/ 3 *3 /   -- + --------                ___        || |                                3 /   -- + --------      |\/ 3 *3 /   -- + --------                ___        || |          /        ______                           |
|  1              7              \/    54      72         |        \/    54      72               7*\/ 3         || |  1              7              \/    54      72         |      \/    54      72               7*\/ 3         || |  1      /  65   \/ 7473                7           |
|- - - ----------------------- - -------------------- + I*|- -------------------------- + -----------------------||*|- - - ----------------------- - -------------------- + I*|-------------------------- - -----------------------||*|- - + 3 /   -- + --------  + -----------------------|
|  6           _______________            2               |              2                        _______________|| |  6           _______________            2               |            2                        _______________|| |  6   \/    54      72               _______________|
|             /        ______                             |                                      /        ______ || |             /        ______                             |                                    /        ______ || |                                    /        ______ |
|            /  65   \/ 7473                              |                                     /  65   \/ 7473  || |            /  65   \/ 7473                              |                                   /  65   \/ 7473  || |                                   /  65   \/ 7473  |
|      72*3 /   -- + --------                             |                               72*3 /   -- + -------- || |      72*3 /   -- + --------                             |                             72*3 /   -- + -------- || |                             36*3 /   -- + -------- |
\         \/    54      72                                \                                  \/    54      72    // \         \/    54      72                                \                                \/    54      72    // \                                \/    54      72    /
$$\left(- \frac{\sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} - \frac{1}{6} - \frac{7}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + i \left(- \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2}\right)\right) \left(- \frac{\sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} - \frac{1}{6} - \frac{7}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} + \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}\right)\right) \left(- \frac{1}{6} + \frac{7}{36 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}\right)$$
=
5/2
$$\frac{5}{2}$$
5/2
Respuesta rápida [src]
                                          _______________     /             _______________                          \
                                         /        ______      |            /        ______                           |
                                        /  65   \/ 7473       |    ___    /  65   \/ 7473                            |
                                     3 /   -- + --------      |  \/ 3 *3 /   -- + --------                ___        |
       1              7              \/    54      72         |        \/    54      72               7*\/ 3         |
x1 = - - - ----------------------- - -------------------- + I*|- -------------------------- + -----------------------|
       6           _______________            2               |              2                        _______________|
                  /        ______                             |                                      /        ______ |
                 /  65   \/ 7473                              |                                     /  65   \/ 7473  |
           72*3 /   -- + --------                             |                               72*3 /   -- + -------- |
              \/    54      72                                \                                  \/    54      72    /
$$x_{1} = - \frac{\sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} - \frac{1}{6} - \frac{7}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} + \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}\right)$$
                                          _______________     /           _______________                          \
                                         /        ______      |          /        ______                           |
                                        /  65   \/ 7473       |  ___    /  65   \/ 7473                            |
                                     3 /   -- + --------      |\/ 3 *3 /   -- + --------                ___        |
       1              7              \/    54      72         |      \/    54      72               7*\/ 3         |
x2 = - - - ----------------------- - -------------------- + I*|-------------------------- - -----------------------|
       6           _______________            2               |            2                        _______________|
                  /        ______                             |                                    /        ______ |
                 /  65   \/ 7473                              |                                   /  65   \/ 7473  |
           72*3 /   -- + --------                             |                             72*3 /   -- + -------- |
              \/    54      72                                \                                \/    54      72    /
$$x_{2} = - \frac{\sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2} - \frac{1}{6} - \frac{7}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + i \left(- \frac{7 \sqrt{3}}{72 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}}{2}\right)$$
                _______________                          
               /        ______                           
       1      /  65   \/ 7473                7           
x3 = - - + 3 /   -- + --------  + -----------------------
       6   \/    54      72               _______________
                                         /        ______ 
                                        /  65   \/ 7473  
                                  36*3 /   -- + -------- 
                                     \/    54      72    
$$x_{3} = - \frac{1}{6} + \frac{7}{36 \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}} + \sqrt[3]{\frac{\sqrt{7473}}{72} + \frac{65}{54}}$$
x3 = -1/6 + 7/(36*(sqrt(7473)/72 + 65/54)^(1/3)) + (sqrt(7473)/72 + 65/54)^(1/3)
Respuesta numérica [src]
x1 = -0.909075336774673 - 1.03449435330565*i
x2 = -0.909075336774673 + 1.03449435330565*i
x3 = 1.31815067354935
x3 = 1.31815067354935