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(a+1)÷(a-1)=(a*2-1)÷(x-2) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
a + 1   a*2 - 1
----- = -------
a - 1    x - 2 
$$\frac{a + 1}{a - 1} = \frac{2 a - 1}{x - 2}$$
Solución detallada
Tenemos la ecuación:
$$\frac{a + 1}{a - 1} = \frac{2 a - 1}{x - 2}$$
Usamos la regla de proporciones:
De a1/b1 = a2/b2 se deduce a1*b2 = a2*b1,
En nuestro caso
a1 = 1 + a

b1 = -1 + a

a2 = -1 + 2*a

b2 = -2 + x

signo obtendremos la ecuación
$$\left(a + 1\right) \left(x - 2\right) = \left(a - 1\right) \left(2 a - 1\right)$$
$$\left(a + 1\right) \left(x - 2\right) = \left(a - 1\right) \left(2 a - 1\right)$$
Abrimos los paréntesis en el miembro izquierdo de la ecuación
1+a-2+x = (-1 + a)*(-1 + 2*a)

Abrimos los paréntesis en el miembro derecho de la ecuación
1+a-2+x = -1+a-1+2*a

Sumamos los términos semejantes en el miembro izquierdo de la ecuación:
(1 + a)*(-2 + x) = -1+a-1+2*a

Sumamos los términos semejantes en el miembro derecho de la ecuación:
(1 + a)*(-2 + x) = (-1 + a)*(-1 + 2*a)

Transportamos los términos libres (sin x)
del miembro izquierdo al derecho, obtenemos:
$$\left(a + 1\right) \left(x - 2\right) + 2 = \left(a - 1\right) \left(2 a - 1\right) + 2$$
Dividamos ambos miembros de la ecuación en (2 + (1 + a)*(-2 + x))/x
x = 2 + (-1 + a)*(-1 + 2*a) / ((2 + (1 + a)*(-2 + x))/x)

Obtenemos la respuesta: x = (3 - a + 2*a^2)/(1 + a)
Gráfica
Suma y producto de raíces [src]
suma
  /                                       /                2          2   \      \               /                2          2   \                                 
  |(1 + re(a))*(-im(a) + 4*im(a)*re(a))   \3 - re(a) - 2*im (a) + 2*re (a)/*im(a)|   (1 + re(a))*\3 - re(a) - 2*im (a) + 2*re (a)/   (-im(a) + 4*im(a)*re(a))*im(a)
I*|------------------------------------ - ---------------------------------------| + --------------------------------------------- + ------------------------------
  |                  2     2                                  2     2            |                          2     2                                 2     2        
  \       (1 + re(a))  + im (a)                    (1 + re(a))  + im (a)         /               (1 + re(a))  + im (a)                   (1 + re(a))  + im (a)     
$$\frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} + i \left(\frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \left(\operatorname{re}{\left(a\right)} + 1\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} - \frac{\left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(a\right)} + 1\right) \left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}$$
=
  /                                       /                2          2   \      \               /                2          2   \                                 
  |(1 + re(a))*(-im(a) + 4*im(a)*re(a))   \3 - re(a) - 2*im (a) + 2*re (a)/*im(a)|   (1 + re(a))*\3 - re(a) - 2*im (a) + 2*re (a)/   (-im(a) + 4*im(a)*re(a))*im(a)
I*|------------------------------------ - ---------------------------------------| + --------------------------------------------- + ------------------------------
  |                  2     2                                  2     2            |                          2     2                                 2     2        
  \       (1 + re(a))  + im (a)                    (1 + re(a))  + im (a)         /               (1 + re(a))  + im (a)                   (1 + re(a))  + im (a)     
$$\frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} + i \left(\frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \left(\operatorname{re}{\left(a\right)} + 1\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} - \frac{\left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(a\right)} + 1\right) \left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}$$
producto
  /                                       /                2          2   \      \               /                2          2   \                                 
  |(1 + re(a))*(-im(a) + 4*im(a)*re(a))   \3 - re(a) - 2*im (a) + 2*re (a)/*im(a)|   (1 + re(a))*\3 - re(a) - 2*im (a) + 2*re (a)/   (-im(a) + 4*im(a)*re(a))*im(a)
I*|------------------------------------ - ---------------------------------------| + --------------------------------------------- + ------------------------------
  |                  2     2                                  2     2            |                          2     2                                 2     2        
  \       (1 + re(a))  + im (a)                    (1 + re(a))  + im (a)         /               (1 + re(a))  + im (a)                   (1 + re(a))  + im (a)     
$$\frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} + i \left(\frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \left(\operatorname{re}{\left(a\right)} + 1\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} - \frac{\left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(a\right)} + 1\right) \left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}$$
=
  2                                 /                2          2   \     /         2          2                                        \      
im (a)*(-1 + 4*re(a)) + (1 + re(a))*\3 - re(a) - 2*im (a) + 2*re (a)/ + I*\-3 - 2*re (a) + 2*im (a) + (1 + re(a))*(-1 + 4*re(a)) + re(a)/*im(a)
-----------------------------------------------------------------------------------------------------------------------------------------------
                                                                        2     2                                                                
                                                             (1 + re(a))  + im (a)                                                             
$$\frac{\left(\operatorname{re}{\left(a\right)} + 1\right) \left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right) + \left(4 \operatorname{re}{\left(a\right)} - 1\right) \left(\operatorname{im}{\left(a\right)}\right)^{2} + i \left(\left(\operatorname{re}{\left(a\right)} + 1\right) \left(4 \operatorname{re}{\left(a\right)} - 1\right) - 2 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \operatorname{re}{\left(a\right)} + 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} - 3\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}$$
(im(a)^2*(-1 + 4*re(a)) + (1 + re(a))*(3 - re(a) - 2*im(a)^2 + 2*re(a)^2) + i*(-3 - 2*re(a)^2 + 2*im(a)^2 + (1 + re(a))*(-1 + 4*re(a)) + re(a))*im(a))/((1 + re(a))^2 + im(a)^2)
Respuesta rápida [src]
       /                                       /                2          2   \      \               /                2          2   \                                 
       |(1 + re(a))*(-im(a) + 4*im(a)*re(a))   \3 - re(a) - 2*im (a) + 2*re (a)/*im(a)|   (1 + re(a))*\3 - re(a) - 2*im (a) + 2*re (a)/   (-im(a) + 4*im(a)*re(a))*im(a)
x1 = I*|------------------------------------ - ---------------------------------------| + --------------------------------------------- + ------------------------------
       |                  2     2                                  2     2            |                          2     2                                 2     2        
       \       (1 + re(a))  + im (a)                    (1 + re(a))  + im (a)         /               (1 + re(a))  + im (a)                   (1 + re(a))  + im (a)     
$$x_{1} = \frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} + i \left(\frac{\left(4 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \operatorname{im}{\left(a\right)}\right) \left(\operatorname{re}{\left(a\right)} + 1\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}} - \frac{\left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right) \operatorname{im}{\left(a\right)}}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}\right) + \frac{\left(\operatorname{re}{\left(a\right)} + 1\right) \left(2 \left(\operatorname{re}{\left(a\right)}\right)^{2} - \operatorname{re}{\left(a\right)} - 2 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 3\right)}{\left(\operatorname{re}{\left(a\right)} + 1\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}}$$
x1 = (4*re(a)*im(a) - im(a))*im(a)/((re(a) + 1)^2 + im(a)^2) + i*((4*re(a)*im(a) - im(a))*(re(a) + 1)/((re(a) + 1)^2 + im(a)^2) - (2*re(a)^2 - re(a) - 2*im(a)^2 + 3)*im(a)/((re(a) + 1)^2 + im(a)^2)) + (re(a) + 1)*(2*re(a)^2 - re(a) - 2*im(a)^2 + 3)/((re(a) + 1)^2 + im(a)^2)