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lg^2(-x)-3*lg(x^2)+5=0

lg^2(-x)-3*lg(x^2)+5=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
   2            / 2\        
log (-x) - 3*log\x / + 5 = 0
$$\left(\log{\left(- x \right)}^{2} - 3 \log{\left(x^{2} \right)}\right) + 5 = 0$$
Gráfica
Respuesta rápida [src]
                                                                              /    /3*pi\\                                  /    /3*pi\\                                          
                                                               ___________    |atan|----||                   ___________    |atan|----||                                          
          /                        /    /3*pi\\\        ___ 4 /         2     |    \ 2  /|            ___ 4 /         2     |    \ 2  /|    /                        /    /3*pi\\\
          |         ___________    |atan|----|||  3 - \/ 2 *\/  4 + 9*pi  *cos|----------|      3 - \/ 2 *\/  4 + 9*pi  *cos|----------|    |         ___________    |atan|----|||
          |  ___ 4 /         2     |    \ 2  /||                              \    2     /                                  \    2     /    |  ___ 4 /         2     |    \ 2  /||
x1 = - cos|\/ 2 *\/  4 + 9*pi  *sin|----------||*e                                         - I*e                                        *sin|\/ 2 *\/  4 + 9*pi  *sin|----------||
          \                        \    2     //                                                                                            \                        \    2     //
$$x_{1} = - \frac{\cos{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}} - \frac{i \sin{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}}$$
x1 = -exp(-sqrt(2)*(4 + 9*pi^2)^(1/4)*cos(atan(3*pi/2)/2) + 3)*cos(sqrt(2)*(4 + 9*pi^2)^(1/4)*sin(atan(3*pi/2)/2)) - i*exp(-sqrt(2)*(4 + 9*pi^2)^(1/4)*cos(atan(3*pi/2)/2) + 3)*sin(sqrt(2)*(4 + 9*pi^2)^(1/4)*sin(atan(3*pi/2)/2))
Suma y producto de raíces [src]
suma
                                                                         /    /3*pi\\                                  /    /3*pi\\                                          
                                                          ___________    |atan|----||                   ___________    |atan|----||                                          
     /                        /    /3*pi\\\        ___ 4 /         2     |    \ 2  /|            ___ 4 /         2     |    \ 2  /|    /                        /    /3*pi\\\
     |         ___________    |atan|----|||  3 - \/ 2 *\/  4 + 9*pi  *cos|----------|      3 - \/ 2 *\/  4 + 9*pi  *cos|----------|    |         ___________    |atan|----|||
     |  ___ 4 /         2     |    \ 2  /||                              \    2     /                                  \    2     /    |  ___ 4 /         2     |    \ 2  /||
- cos|\/ 2 *\/  4 + 9*pi  *sin|----------||*e                                         - I*e                                        *sin|\/ 2 *\/  4 + 9*pi  *sin|----------||
     \                        \    2     //                                                                                            \                        \    2     //
$$- \frac{\cos{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}} - \frac{i \sin{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}}$$
=
                                                                         /    /3*pi\\                                  /    /3*pi\\                                          
                                                          ___________    |atan|----||                   ___________    |atan|----||                                          
     /                        /    /3*pi\\\        ___ 4 /         2     |    \ 2  /|            ___ 4 /         2     |    \ 2  /|    /                        /    /3*pi\\\
     |         ___________    |atan|----|||  3 - \/ 2 *\/  4 + 9*pi  *cos|----------|      3 - \/ 2 *\/  4 + 9*pi  *cos|----------|    |         ___________    |atan|----|||
     |  ___ 4 /         2     |    \ 2  /||                              \    2     /                                  \    2     /    |  ___ 4 /         2     |    \ 2  /||
- cos|\/ 2 *\/  4 + 9*pi  *sin|----------||*e                                         - I*e                                        *sin|\/ 2 *\/  4 + 9*pi  *sin|----------||
     \                        \    2     //                                                                                            \                        \    2     //
$$- \frac{\cos{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}} - \frac{i \sin{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}}$$
producto
                                                                         /    /3*pi\\                                  /    /3*pi\\                                          
                                                          ___________    |atan|----||                   ___________    |atan|----||                                          
     /                        /    /3*pi\\\        ___ 4 /         2     |    \ 2  /|            ___ 4 /         2     |    \ 2  /|    /                        /    /3*pi\\\
     |         ___________    |atan|----|||  3 - \/ 2 *\/  4 + 9*pi  *cos|----------|      3 - \/ 2 *\/  4 + 9*pi  *cos|----------|    |         ___________    |atan|----|||
     |  ___ 4 /         2     |    \ 2  /||                              \    2     /                                  \    2     /    |  ___ 4 /         2     |    \ 2  /||
- cos|\/ 2 *\/  4 + 9*pi  *sin|----------||*e                                         - I*e                                        *sin|\/ 2 *\/  4 + 9*pi  *sin|----------||
     \                        \    2     //                                                                                            \                        \    2     //
$$- \frac{\cos{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}} - \frac{i \sin{\left(\sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \sin{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} \right)}}{e^{-3 + \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)}}}$$
=
                                                                                              /3*pi\ 
                                                                                       -I*atan|----| 
                                                                  /           /3*pi\\         \ 2  / 
                              /    /3*pi\\            ___________ |     I*atan|----||  --------------
               ___________    |atan|----||     ___ 4 /         2  |           \ 2  /|        2       
        ___ 4 /         2     |    \ 2  /|   \/ 2 *\/  4 + 9*pi  *\1 - e            /*e              
  3 - \/ 2 *\/  4 + 9*pi  *cos|----------| - --------------------------------------------------------
                              \    2     /                              2                            
-e                                                                                                   
$$- e^{- \sqrt{2} \sqrt[4]{4 + 9 \pi^{2}} \cos{\left(\frac{\operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2} \right)} + 3 - \frac{\sqrt{2} \left(1 - e^{i \operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}\right) \sqrt[4]{4 + 9 \pi^{2}} e^{- \frac{i \operatorname{atan}{\left(\frac{3 \pi}{2} \right)}}{2}}}{2}}$$
-exp(3 - sqrt(2)*(4 + 9*pi^2)^(1/4)*cos(atan(3*pi/2)/2) - sqrt(2)*(4 + 9*pi^2)^(1/4)*(1 - exp(i*atan(3*pi/2)))*exp(-i*atan(3*pi/2)/2)/2)
Respuesta numérica [src]
x1 = -148.413159102577
x2 = -2.71828182845905
x3 = 0.616083893773979 + 0.245005112322469*i
x3 = 0.616083893773979 + 0.245005112322469*i
Gráfico
lg^2(-x)-3*lg(x^2)+5=0 la ecuación