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z^4+(2i/(1+√(3)i))=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
 4       2*I        
z  + ----------- = 0
           ___      
     1 + \/ 3 *I    
$$z^{4} + \frac{2 i}{1 + \sqrt{3} i} = 0$$
Solución detallada
Tenemos la ecuación
$$z^{4} + \frac{2 i}{1 + \sqrt{3} i} = 0$$
Ya que la potencia en la ecuación es igual a = 4 y miembro libre = -2*i/(1 + i*sqrt(3)) complejo,
significa que la ecuación correspondiente no tiene soluciones reales

Las demás 4 raíces son complejas.
hacemos el cambio:
$$w = z$$
entonces la ecuación será así:
$$w^{4} = - \frac{2 i}{1 + \sqrt{3} i}$$
Cualquier número complejo se puede presentar que:
$$w = r e^{i p}$$
sustituimos en la ecuación
$$r^{4} e^{4 i p} = - \frac{2 i}{1 + \sqrt{3} i}$$
donde
$$r = 1$$
- módulo del número complejo
Sustituyamos r:
$$e^{4 i p} = - \frac{2 i}{1 + \sqrt{3} i}$$
Usando la fórmula de Euler hallemos las raíces para p
$$i \sin{\left(4 p \right)} + \cos{\left(4 p \right)} = - \frac{2 i}{1 + \sqrt{3} i}$$
es decir
$$\cos{\left(4 p \right)} = - \frac{\sqrt{3}}{2}$$
y
$$\sin{\left(4 p \right)} = - \frac{1}{2}$$
entonces
$$p = \frac{\pi N}{2} + \frac{\pi}{24}$$
donde N=0,1,2,3,...
Seleccionando los valores de N y sustituyendo p en la fórmula para w
Es decir, la solución será para w:
$$w_{1} = \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}$$
$$w_{2} = - \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} - \frac{i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}$$
$$w_{3} = - \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{3} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}$$
$$w_{4} = - \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} - \frac{i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}$$
hacemos cambio inverso
$$w = z$$
$$z = w$$

Entonces la respuesta definitiva es:
$$z_{1} = \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}$$
$$z_{2} = - \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} - \frac{i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}$$
$$z_{3} = - \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{3} i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}$$
$$z_{4} = - \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} - \frac{i \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}$$
Gráfica
Respuesta rápida [src]
          ___________     /     ___________              ___________\              ___________
         /       ___      |    /       ___              /       ___ |             /       ___ 
        /  1   \/ 2       |   /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  
       /   - + -----      |  /   - - -----    \/ 3 *  /   - + ----- |   \/ 3 *  /   - - ----- 
     \/    2     4        |\/    2     4            \/    2     4   |         \/    2     4   
z1 = ---------------- + I*|---------------- - ----------------------| + ----------------------
            2             \       2                     2           /             2           
$$z_{1} = \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + i \left(- \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right)$$
          ___________     /       ___________              ___________\              ___________
         /       ___      |      /       ___              /       ___ |             /       ___ 
        /  1   \/ 2       |     /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  
       /   - - -----      |    /   - + -----    \/ 3 *  /   - - ----- |   \/ 3 *  /   - + ----- 
     \/    2     4        |  \/    2     4            \/    2     4   |         \/    2     4   
z2 = ---------------- + I*|- ---------------- - ----------------------| - ----------------------
            2             \         2                     2           /             2           
$$z_{2} = - \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + i \left(- \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right)$$
            ___________     /     ___________              ___________\              ___________
           /       ___      |    /       ___              /       ___ |             /       ___ 
          /  1   \/ 2       |   /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  
         /   - - -----      |  /   - + -----    \/ 3 *  /   - - ----- |   \/ 3 *  /   - + ----- 
       \/    2     4        |\/    2     4            \/    2     4   |         \/    2     4   
z3 = - ---------------- + I*|---------------- + ----------------------| + ----------------------
              2             \       2                     2           /             2           
$$z_{3} = - \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + i \left(\frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right)$$
            ___________     /       ___________              ___________\              ___________
           /       ___      |      /       ___              /       ___ |             /       ___ 
          /  1   \/ 2       |     /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  
         /   - + -----      |    /   - - -----    \/ 3 *  /   - + ----- |   \/ 3 *  /   - - ----- 
       \/    2     4        |  \/    2     4            \/    2     4   |         \/    2     4   
z4 = - ---------------- + I*|- ---------------- + ----------------------| - ----------------------
              2             \         2                     2           /             2           
$$z_{4} = - \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + i \left(- \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right)$$
z4 = -sqrt(sqrt(2)/4 + 1/2)/2 - sqrt(3)*sqrt(1/2 - sqrt(2)/4)/2 + i*(-sqrt(1/2 - sqrt(2)/4)/2 + sqrt(3)*sqrt(sqrt(2)/4 + 1/2)/2)
Suma y producto de raíces [src]
suma
     ___________     /     ___________              ___________\              ___________        ___________     /       ___________              ___________\              ___________          ___________     /     ___________              ___________\              ___________          ___________     /       ___________              ___________\              ___________
    /       ___      |    /       ___              /       ___ |             /       ___        /       ___      |      /       ___              /       ___ |             /       ___          /       ___      |    /       ___              /       ___ |             /       ___          /       ___      |      /       ___              /       ___ |             /       ___ 
   /  1   \/ 2       |   /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2        /  1   \/ 2       |     /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2          /  1   \/ 2       |   /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2          /  1   \/ 2       |     /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  
  /   - + -----      |  /   - - -----    \/ 3 *  /   - + ----- |   \/ 3 *  /   - - -----      /   - - -----      |    /   - + -----    \/ 3 *  /   - - ----- |   \/ 3 *  /   - + -----        /   - - -----      |  /   - + -----    \/ 3 *  /   - - ----- |   \/ 3 *  /   - + -----        /   - + -----      |    /   - - -----    \/ 3 *  /   - + ----- |   \/ 3 *  /   - - ----- 
\/    2     4        |\/    2     4            \/    2     4   |         \/    2     4      \/    2     4        |  \/    2     4            \/    2     4   |         \/    2     4        \/    2     4        |\/    2     4            \/    2     4   |         \/    2     4        \/    2     4        |  \/    2     4            \/    2     4   |         \/    2     4   
---------------- + I*|---------------- - ----------------------| + ---------------------- + ---------------- + I*|- ---------------- - ----------------------| - ---------------------- + - ---------------- + I*|---------------- + ----------------------| + ---------------------- + - ---------------- + I*|- ---------------- + ----------------------| - ----------------------
       2             \       2                     2           /             2                     2             \         2                     2           /             2                       2             \       2                     2           /             2                       2             \         2                     2           /             2           
$$\left(\left(\left(- \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + i \left(- \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right)\right) + \left(\frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + i \left(- \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right)\right)\right) + \left(- \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + i \left(\frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right)\right)\right) + \left(- \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + i \left(- \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right)\right)$$
=
  /     ___________              ___________\     /     ___________              ___________\     /       ___________              ___________\     /       ___________              ___________\
  |    /       ___              /       ___ |     |    /       ___              /       ___ |     |      /       ___              /       ___ |     |      /       ___              /       ___ |
  |   /  1   \/ 2       ___    /  1   \/ 2  |     |   /  1   \/ 2       ___    /  1   \/ 2  |     |     /  1   \/ 2       ___    /  1   \/ 2  |     |     /  1   \/ 2       ___    /  1   \/ 2  |
  |  /   - - -----    \/ 3 *  /   - + ----- |     |  /   - + -----    \/ 3 *  /   - - ----- |     |    /   - - -----    \/ 3 *  /   - + ----- |     |    /   - + -----    \/ 3 *  /   - - ----- |
  |\/    2     4            \/    2     4   |     |\/    2     4            \/    2     4   |     |  \/    2     4            \/    2     4   |     |  \/    2     4            \/    2     4   |
I*|---------------- - ----------------------| + I*|---------------- + ----------------------| + I*|- ---------------- + ----------------------| + I*|- ---------------- - ----------------------|
  \       2                     2           /     \       2                     2           /     \         2                     2           /     \         2                     2           /
$$i \left(- \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right) + i \left(- \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right) + i \left(- \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right) + i \left(\frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right)$$
producto
/     ___________     /     ___________              ___________\              ___________\ /     ___________     /       ___________              ___________\              ___________\ /       ___________     /     ___________              ___________\              ___________\ /       ___________     /       ___________              ___________\              ___________\
|    /       ___      |    /       ___              /       ___ |             /       ___ | |    /       ___      |      /       ___              /       ___ |             /       ___ | |      /       ___      |    /       ___              /       ___ |             /       ___ | |      /       ___      |      /       ___              /       ___ |             /       ___ |
|   /  1   \/ 2       |   /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  | |   /  1   \/ 2       |     /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  | |     /  1   \/ 2       |   /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  | |     /  1   \/ 2       |     /  1   \/ 2       ___    /  1   \/ 2  |     ___    /  1   \/ 2  |
|  /   - + -----      |  /   - - -----    \/ 3 *  /   - + ----- |   \/ 3 *  /   - - ----- | |  /   - - -----      |    /   - + -----    \/ 3 *  /   - - ----- |   \/ 3 *  /   - + ----- | |    /   - - -----      |  /   - + -----    \/ 3 *  /   - - ----- |   \/ 3 *  /   - + ----- | |    /   - + -----      |    /   - - -----    \/ 3 *  /   - + ----- |   \/ 3 *  /   - - ----- |
|\/    2     4        |\/    2     4            \/    2     4   |         \/    2     4   | |\/    2     4        |  \/    2     4            \/    2     4   |         \/    2     4   | |  \/    2     4        |\/    2     4            \/    2     4   |         \/    2     4   | |  \/    2     4        |  \/    2     4            \/    2     4   |         \/    2     4   |
|---------------- + I*|---------------- - ----------------------| + ----------------------|*|---------------- + I*|- ---------------- - ----------------------| - ----------------------|*|- ---------------- + I*|---------------- + ----------------------| + ----------------------|*|- ---------------- + I*|- ---------------- + ----------------------| - ----------------------|
\       2             \       2                     2           /             2           / \       2             \         2                     2           /             2           / \         2             \       2                     2           /             2           / \         2             \         2                     2           /             2           /
$$\left(\frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + i \left(- \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right)\right) \left(- \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + i \left(- \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2}\right)\right) \left(- \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} + i \left(\frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right)\right) \left(- \frac{\sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2} - \frac{\sqrt{3} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + i \left(- \frac{\sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}}}{2} + \frac{\sqrt{3} \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}}{2}\right)\right)$$
=
      ___
I   \/ 3 
- + -----
2     2  
$$\frac{\sqrt{3}}{2} + \frac{i}{2}$$
i/2 + sqrt(3)/2
Respuesta numérica [src]
z1 = 0.608761429008721 + 0.793353340291235*i
z2 = -0.793353340291235 + 0.608761429008721*i
z3 = 0.793353340291235 - 0.608761429008721*i
z4 = -0.608761429008721 - 0.793353340291235*i
z4 = -0.608761429008721 - 0.793353340291235*i