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log(y-1)/2-log(y+1)/2=c+log(x)-1/x la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
log(y - 1)   log(y + 1)                1
---------- - ---------- = c + log(x) - -
    2            2                     x
$$\frac{\log{\left(y - 1 \right)}}{2} - \frac{\log{\left(y + 1 \right)}}{2} = \left(c + \log{\left(x \right)}\right) - \frac{1}{x}$$
Gráfica
Respuesta rápida [src]
         /                  /      ______________\\     /                  /      ______________\\
         |                  |     /          2*c ||     |                  |     /          2*c ||
         |                  |    /  (1 + y)*e    ||     |                  |    /  (1 + y)*e    ||
         |            -c + W|-  /   ------------ ||     |            -c + W|-  /   ------------ ||
         |  ________        \ \/       -1 + y    /|     |  ________        \ \/       -1 + y    /|
         |\/ -1 + y *e                            |     |\/ -1 + y *e                            |
x1 = I*im|----------------------------------------| + re|----------------------------------------|
         |                 _______                |     |                 _______                |
         \               \/ 1 + y                 /     \               \/ 1 + y                 /
$$x_{1} = \operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}$$
         /                  /     ______________\\     /                  /     ______________\\
         |                  |    /          2*c ||     |                  |    /          2*c ||
         |                  |   /  (1 + y)*e    ||     |                  |   /  (1 + y)*e    ||
         |            -c + W|  /   ------------ ||     |            -c + W|  /   ------------ ||
         |  ________        \\/       -1 + y    /|     |  ________        \\/       -1 + y    /|
         |\/ -1 + y *e                           |     |\/ -1 + y *e                           |
x2 = I*im|---------------------------------------| + re|---------------------------------------|
         |                 _______               |     |                 _______               |
         \               \/ 1 + y                /     \               \/ 1 + y                /
$$x_{2} = \operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}$$
x2 = re(sqrt(y - 1)*exp(-c + LambertW(sqrt((y + 1)*exp(2*c)/(y - 1))))/sqrt(y + 1)) + i*im(sqrt(y - 1)*exp(-c + LambertW(sqrt((y + 1)*exp(2*c)/(y - 1))))/sqrt(y + 1))
Suma y producto de raíces [src]
suma
    /                  /      ______________\\     /                  /      ______________\\       /                  /     ______________\\     /                  /     ______________\\
    |                  |     /          2*c ||     |                  |     /          2*c ||       |                  |    /          2*c ||     |                  |    /          2*c ||
    |                  |    /  (1 + y)*e    ||     |                  |    /  (1 + y)*e    ||       |                  |   /  (1 + y)*e    ||     |                  |   /  (1 + y)*e    ||
    |            -c + W|-  /   ------------ ||     |            -c + W|-  /   ------------ ||       |            -c + W|  /   ------------ ||     |            -c + W|  /   ------------ ||
    |  ________        \ \/       -1 + y    /|     |  ________        \ \/       -1 + y    /|       |  ________        \\/       -1 + y    /|     |  ________        \\/       -1 + y    /|
    |\/ -1 + y *e                            |     |\/ -1 + y *e                            |       |\/ -1 + y *e                           |     |\/ -1 + y *e                           |
I*im|----------------------------------------| + re|----------------------------------------| + I*im|---------------------------------------| + re|---------------------------------------|
    |                 _______                |     |                 _______                |       |                 _______               |     |                 _______               |
    \               \/ 1 + y                 /     \               \/ 1 + y                 /       \               \/ 1 + y                /     \               \/ 1 + y                /
$$\left(\operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}\right) + \left(\operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}\right)$$
=
    /                  /     ______________\\       /                  /      ______________\\     /                  /     ______________\\     /                  /      ______________\\
    |                  |    /          2*c ||       |                  |     /          2*c ||     |                  |    /          2*c ||     |                  |     /          2*c ||
    |                  |   /  (1 + y)*e    ||       |                  |    /  (1 + y)*e    ||     |                  |   /  (1 + y)*e    ||     |                  |    /  (1 + y)*e    ||
    |            -c + W|  /   ------------ ||       |            -c + W|-  /   ------------ ||     |            -c + W|  /   ------------ ||     |            -c + W|-  /   ------------ ||
    |  ________        \\/       -1 + y    /|       |  ________        \ \/       -1 + y    /|     |  ________        \\/       -1 + y    /|     |  ________        \ \/       -1 + y    /|
    |\/ -1 + y *e                           |       |\/ -1 + y *e                            |     |\/ -1 + y *e                           |     |\/ -1 + y *e                            |
I*im|---------------------------------------| + I*im|----------------------------------------| + re|---------------------------------------| + re|----------------------------------------|
    |                 _______               |       |                 _______                |     |                 _______               |     |                 _______                |
    \               \/ 1 + y                /       \               \/ 1 + y                 /     \               \/ 1 + y                /     \               \/ 1 + y                 /
$$\operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + \operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}$$
producto
/    /                  /      ______________\\     /                  /      ______________\\\ /    /                  /     ______________\\     /                  /     ______________\\\
|    |                  |     /          2*c ||     |                  |     /          2*c ||| |    |                  |    /          2*c ||     |                  |    /          2*c |||
|    |                  |    /  (1 + y)*e    ||     |                  |    /  (1 + y)*e    ||| |    |                  |   /  (1 + y)*e    ||     |                  |   /  (1 + y)*e    |||
|    |            -c + W|-  /   ------------ ||     |            -c + W|-  /   ------------ ||| |    |            -c + W|  /   ------------ ||     |            -c + W|  /   ------------ |||
|    |  ________        \ \/       -1 + y    /|     |  ________        \ \/       -1 + y    /|| |    |  ________        \\/       -1 + y    /|     |  ________        \\/       -1 + y    /||
|    |\/ -1 + y *e                            |     |\/ -1 + y *e                            || |    |\/ -1 + y *e                           |     |\/ -1 + y *e                           ||
|I*im|----------------------------------------| + re|----------------------------------------||*|I*im|---------------------------------------| + re|---------------------------------------||
|    |                 _______                |     |                 _______                || |    |                 _______               |     |                 _______               ||
\    \               \/ 1 + y                 /     \               \/ 1 + y                 // \    \               \/ 1 + y                /     \               \/ 1 + y                //
$$\left(\operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}\right) \left(\operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}\right)$$
=
/    /                  /     ______________\\     /                  /     ______________\\\ /    /                  /      ______________\\     /                  /      ______________\\\
|    |                  |    /          2*c ||     |                  |    /          2*c ||| |    |                  |     /          2*c ||     |                  |     /          2*c |||
|    |                  |   /  (1 + y)*e    ||     |                  |   /  (1 + y)*e    ||| |    |                  |    /  (1 + y)*e    ||     |                  |    /  (1 + y)*e    |||
|    |            -c + W|  /   ------------ ||     |            -c + W|  /   ------------ ||| |    |            -c + W|-  /   ------------ ||     |            -c + W|-  /   ------------ |||
|    |  ________        \\/       -1 + y    /|     |  ________        \\/       -1 + y    /|| |    |  ________        \ \/       -1 + y    /|     |  ________        \ \/       -1 + y    /||
|    |\/ -1 + y *e                           |     |\/ -1 + y *e                           || |    |\/ -1 + y *e                            |     |\/ -1 + y *e                            ||
|I*im|---------------------------------------| + re|---------------------------------------||*|I*im|----------------------------------------| + re|----------------------------------------||
|    |                 _______               |     |                 _______               || |    |                 _______                |     |                 _______                ||
\    \               \/ 1 + y                /     \               \/ 1 + y                // \    \               \/ 1 + y                 /     \               \/ 1 + y                 //
$$\left(\operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(- \sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}\right) \left(\operatorname{re}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)} + i \operatorname{im}{\left(\frac{\sqrt{y - 1} e^{- c + W\left(\sqrt{\frac{\left(y + 1\right) e^{2 c}}{y - 1}}\right)}}{\sqrt{y + 1}}\right)}\right)$$
(i*im(sqrt(-1 + y)*exp(-c + LambertW(sqrt((1 + y)*exp(2*c)/(-1 + y))))/sqrt(1 + y)) + re(sqrt(-1 + y)*exp(-c + LambertW(sqrt((1 + y)*exp(2*c)/(-1 + y))))/sqrt(1 + y)))*(i*im(sqrt(-1 + y)*exp(-c + LambertW(-sqrt((1 + y)*exp(2*c)/(-1 + y))))/sqrt(1 + y)) + re(sqrt(-1 + y)*exp(-c + LambertW(-sqrt((1 + y)*exp(2*c)/(-1 + y))))/sqrt(1 + y)))