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yx-y=-1 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
y*x - y = -1
$$x y - y = -1$$
Solución detallada
Tenemos una ecuación lineal:
y*x-y = -1

Dividamos ambos miembros de la ecuación en (-y + x*y)/x
x = -1 / ((-y + x*y)/x)

Obtenemos la respuesta: x = (-1 + y)/y
Resolución de la ecuación paramétrica
Se da la ecuación con parámetro:
$$x y - y = -1$$
Коэффициент при x равен
$$y$$
entonces son posibles los casos para y :
$$y < 0$$
$$y = 0$$
Consideremos todos los casos con detalles:
Con
$$y < 0$$
la ecuación será
$$2 - x = 0$$
su solución
$$x = 2$$
Con
$$y = 0$$
la ecuación será
$$1 = 0$$
su solución
no hay soluciones
Gráfica
Respuesta rápida [src]
                                                       2                            
       /  im(y)*re(y)     (-1 + re(y))*im(y)\        im (y)       (-1 + re(y))*re(y)
x1 = I*|--------------- - ------------------| + --------------- + ------------------
       |  2        2         2        2     |     2        2         2        2     
       \im (y) + re (y)    im (y) + re (y)  /   im (y) + re (y)    im (y) + re (y)  
$$x_{1} = i \left(- \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{re}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}$$
x1 = i*(-(re(y) - 1)*im(y)/(re(y)^2 + im(y)^2) + re(y)*im(y)/(re(y)^2 + im(y)^2)) + (re(y) - 1)*re(y)/(re(y)^2 + im(y)^2) + im(y)^2/(re(y)^2 + im(y)^2)
Suma y producto de raíces [src]
suma
                                                  2                            
  /  im(y)*re(y)     (-1 + re(y))*im(y)\        im (y)       (-1 + re(y))*re(y)
I*|--------------- - ------------------| + --------------- + ------------------
  |  2        2         2        2     |     2        2         2        2     
  \im (y) + re (y)    im (y) + re (y)  /   im (y) + re (y)    im (y) + re (y)  
$$i \left(- \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{re}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}$$
=
                                                  2                            
  /  im(y)*re(y)     (-1 + re(y))*im(y)\        im (y)       (-1 + re(y))*re(y)
I*|--------------- - ------------------| + --------------- + ------------------
  |  2        2         2        2     |     2        2         2        2     
  \im (y) + re (y)    im (y) + re (y)  /   im (y) + re (y)    im (y) + re (y)  
$$i \left(- \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{re}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}$$
producto
                                                  2                            
  /  im(y)*re(y)     (-1 + re(y))*im(y)\        im (y)       (-1 + re(y))*re(y)
I*|--------------- - ------------------| + --------------- + ------------------
  |  2        2         2        2     |     2        2         2        2     
  \im (y) + re (y)    im (y) + re (y)  /   im (y) + re (y)    im (y) + re (y)  
$$i \left(- \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{re}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}$$
=
  2                                  
im (y) + I*im(y) + (-1 + re(y))*re(y)
-------------------------------------
             2        2              
           im (y) + re (y)           
$$\frac{\left(\operatorname{re}{\left(y\right)} - 1\right) \operatorname{re}{\left(y\right)} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + i \operatorname{im}{\left(y\right)}}{\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}}$$
(im(y)^2 + i*im(y) + (-1 + re(y))*re(y))/(im(y)^2 + re(y)^2)