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x^7-3x^6+5x^5-7x^4+8x^3-8x^2+6x-2=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
 7      6      5      4      3      2              
x  - 3*x  + 5*x  - 7*x  + 8*x  - 8*x  + 6*x - 2 = 0
$$\left(6 x + \left(- 8 x^{2} + \left(8 x^{3} + \left(- 7 x^{4} + \left(5 x^{5} + \left(x^{7} - 3 x^{6}\right)\right)\right)\right)\right)\right) - 2 = 0$$
Gráfica
Respuesta rápida [src]
x1 = 1
$$x_{1} = 1$$
                  ___________                ___________
                 /       ___                /       ___ 
       4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  
x2 = - \/ 2 *  /   - - -----  + I*\/ 2 *  /   - + ----- 
             \/    2     4              \/    2     4   
$$x_{2} = - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
                ___________                ___________
               /       ___                /       ___ 
     4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  
x3 = \/ 2 *  /   - - -----  - I*\/ 2 *  /   - + ----- 
           \/    2     4              \/    2     4   
$$x_{3} = \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
                  ___________                ___________
                 /       ___                /       ___ 
       4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  
x4 = - \/ 2 *  /   - - -----  - I*\/ 2 *  /   - + ----- 
             \/    2     4              \/    2     4   
$$x_{4} = - \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
                ___________                ___________
               /       ___                /       ___ 
     4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  
x5 = \/ 2 *  /   - - -----  + I*\/ 2 *  /   - + ----- 
           \/    2     4              \/    2     4   
$$x_{5} = \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}$$
x5 = 2^(1/4)*sqrt(1/2 - sqrt(2)/4) + 2^(1/4)*i*sqrt(sqrt(2)/4 + 1/2)
Suma y producto de raíces [src]
suma
                 ___________                ___________              ___________                ___________                ___________                ___________              ___________                ___________
                /       ___                /       ___              /       ___                /       ___                /       ___                /       ___              /       ___                /       ___ 
      4 ___    /  1   \/ 2       4 ___    /  1   \/ 2     4 ___    /  1   \/ 2       4 ___    /  1   \/ 2       4 ___    /  1   \/ 2       4 ___    /  1   \/ 2     4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  
1 + - \/ 2 *  /   - - -----  + I*\/ 2 *  /   - + -----  + \/ 2 *  /   - - -----  - I*\/ 2 *  /   - + -----  + - \/ 2 *  /   - - -----  - I*\/ 2 *  /   - + -----  + \/ 2 *  /   - - -----  + I*\/ 2 *  /   - + ----- 
            \/    2     4              \/    2     4            \/    2     4              \/    2     4              \/    2     4              \/    2     4            \/    2     4              \/    2     4   
$$\left(\left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) + \left(\left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) + \left(1 + \left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)\right)\right)\right) + \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)$$
=
1
$$1$$
producto
/             ___________                ___________\ /           ___________                ___________\ /             ___________                ___________\ /           ___________                ___________\
|            /       ___                /       ___ | |          /       ___                /       ___ | |            /       ___                /       ___ | |          /       ___                /       ___ |
|  4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  | |4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  | |  4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  | |4 ___    /  1   \/ 2       4 ___    /  1   \/ 2  |
|- \/ 2 *  /   - - -----  + I*\/ 2 *  /   - + ----- |*|\/ 2 *  /   - - -----  - I*\/ 2 *  /   - + ----- |*|- \/ 2 *  /   - - -----  - I*\/ 2 *  /   - + ----- |*|\/ 2 *  /   - - -----  + I*\/ 2 *  /   - + ----- |
\        \/    2     4              \/    2     4   / \      \/    2     4              \/    2     4   / \        \/    2     4              \/    2     4   / \      \/    2     4              \/    2     4   /
$$\left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) \left(- \sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} - \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right) \left(\sqrt[4]{2} \sqrt{\frac{1}{2} - \frac{\sqrt{2}}{4}} + \sqrt[4]{2} i \sqrt{\frac{\sqrt{2}}{4} + \frac{1}{2}}\right)$$
=
2
$$2$$
2
Respuesta numérica [src]
x1 = 0.455089860562227 + 1.09868411346781*i
x2 = -0.455089860562227 + 1.09868411346781*i
x3 = -0.455089860562227 - 1.09868411346781*i
x4 = 1.0
x5 = 0.455089860562227 - 1.09868411346781*i
x5 = 0.455089860562227 - 1.09868411346781*i