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xy^3+y^2=1 la ecuación

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Solución numérica:

Buscar la solución numérica en el intervalo [, ]

Solución

Ha introducido [src]
   3    2    
x*y  + y  = 1
$$x y^{3} + y^{2} = 1$$
Solución detallada
Tenemos una ecuación lineal:
x*y^3+y^2 = 1

Dividamos ambos miembros de la ecuación en (y^2 + x*y^3)/x
x = 1 / ((y^2 + x*y^3)/x)

Obtenemos la respuesta: x = (1 - y^2)/y^3
Resolución de la ecuación paramétrica
Se da la ecuación con parámetro:
$$x y^{3} + y^{2} = 1$$
Коэффициент при x равен
$$y^{3}$$
entonces son posibles los casos para y :
$$y < 0$$
$$y = 0$$
Consideremos todos los casos con detalles:
Con
$$y < 0$$
la ecuación será
$$- x = 0$$
su solución
$$x = 0$$
Con
$$y = 0$$
la ecuación será
$$-1 = 0$$
su solución
no hay soluciones
Gráfica
Suma y producto de raíces [src]
suma
  //        3                  2           \                           /        3                  2           \            \   /        3                  2           \                           /        3                  2           \            
  ||      im (y)           3*re (y)*im(y)  | /      2        2   \     |      re (y)           3*im (y)*re(y)  |            |   |      re (y)           3*im (y)*re(y)  | /      2        2   \     |      im (y)           3*re (y)*im(y)  |            
I*||------------------ - ------------------|*\1 + im (y) - re (y)/ - 2*|------------------ - ------------------|*im(y)*re(y)| + |------------------ - ------------------|*\1 + im (y) - re (y)/ + 2*|------------------ - ------------------|*im(y)*re(y)
  ||                 3                    3|                           |                 3                    3|            |   |                 3                    3|                           |                 3                    3|            
  ||/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            |   |/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            
  \\\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            /   \\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            
$$\left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right) + i \left(- 2 \left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)} + \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right)\right) + 2 \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}$$
=
  //        3                  2           \                           /        3                  2           \            \   /        3                  2           \                           /        3                  2           \            
  ||      im (y)           3*re (y)*im(y)  | /      2        2   \     |      re (y)           3*im (y)*re(y)  |            |   |      re (y)           3*im (y)*re(y)  | /      2        2   \     |      im (y)           3*re (y)*im(y)  |            
I*||------------------ - ------------------|*\1 + im (y) - re (y)/ - 2*|------------------ - ------------------|*im(y)*re(y)| + |------------------ - ------------------|*\1 + im (y) - re (y)/ + 2*|------------------ - ------------------|*im(y)*re(y)
  ||                 3                    3|                           |                 3                    3|            |   |                 3                    3|                           |                 3                    3|            
  ||/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            |   |/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            
  \\\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            /   \\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            
$$\left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right) + i \left(- 2 \left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)} + \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right)\right) + 2 \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}$$
producto
  //        3                  2           \                           /        3                  2           \            \   /        3                  2           \                           /        3                  2           \            
  ||      im (y)           3*re (y)*im(y)  | /      2        2   \     |      re (y)           3*im (y)*re(y)  |            |   |      re (y)           3*im (y)*re(y)  | /      2        2   \     |      im (y)           3*re (y)*im(y)  |            
I*||------------------ - ------------------|*\1 + im (y) - re (y)/ - 2*|------------------ - ------------------|*im(y)*re(y)| + |------------------ - ------------------|*\1 + im (y) - re (y)/ + 2*|------------------ - ------------------|*im(y)*re(y)
  ||                 3                    3|                           |                 3                    3|            |   |                 3                    3|                           |                 3                    3|            
  ||/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            |   |/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            
  \\\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            /   \\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            
$$\left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right) + i \left(- 2 \left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)} + \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right)\right) + 2 \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}$$
=
  /  2    /      2          2   \   /    2          2   \ /      2        2   \\         /  2          2   \ /      2        2   \             2    /    2          2   \      
I*\re (y)*\- 2*re (y) + 6*im (y)/ - \- im (y) + 3*re (y)/*\1 + im (y) - re (y)//*im(y) + \re (y) - 3*im (y)/*\1 + im (y) - re (y)/*re(y) - 2*im (y)*\- im (y) + 3*re (y)/*re(y)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                3                                                                              
                                                                               /  2        2   \                                                                               
                                                                               \im (y) + re (y)/                                                                               
$$\frac{i \left(\left(- 2 \left(\operatorname{re}{\left(y\right)}\right)^{2} + 6 \left(\operatorname{im}{\left(y\right)}\right)^{2}\right) \left(\operatorname{re}{\left(y\right)}\right)^{2} - \left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - \left(\operatorname{im}{\left(y\right)}\right)^{2}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right)\right) \operatorname{im}{\left(y\right)} + \left(\left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right) \operatorname{re}{\left(y\right)} - 2 \left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - \left(\operatorname{im}{\left(y\right)}\right)^{2}\right) \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}$$
(i*(re(y)^2*(-2*re(y)^2 + 6*im(y)^2) - (-im(y)^2 + 3*re(y)^2)*(1 + im(y)^2 - re(y)^2))*im(y) + (re(y)^2 - 3*im(y)^2)*(1 + im(y)^2 - re(y)^2)*re(y) - 2*im(y)^2*(-im(y)^2 + 3*re(y)^2)*re(y))/(im(y)^2 + re(y)^2)^3
Respuesta rápida [src]
       //        3                  2           \                           /        3                  2           \            \   /        3                  2           \                           /        3                  2           \            
       ||      im (y)           3*re (y)*im(y)  | /      2        2   \     |      re (y)           3*im (y)*re(y)  |            |   |      re (y)           3*im (y)*re(y)  | /      2        2   \     |      im (y)           3*re (y)*im(y)  |            
x1 = I*||------------------ - ------------------|*\1 + im (y) - re (y)/ - 2*|------------------ - ------------------|*im(y)*re(y)| + |------------------ - ------------------|*\1 + im (y) - re (y)/ + 2*|------------------ - ------------------|*im(y)*re(y)
       ||                 3                    3|                           |                 3                    3|            |   |                 3                    3|                           |                 3                    3|            
       ||/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            |   |/  2        2   \    /  2        2   \ |                           |/  2        2   \    /  2        2   \ |            
       \\\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            /   \\im (y) + re (y)/    \im (y) + re (y)/ /                           \\im (y) + re (y)/    \im (y) + re (y)/ /            
$$x_{1} = \left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right) + i \left(- 2 \left(\frac{\left(\operatorname{re}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} - \frac{3 \operatorname{re}{\left(y\right)} \left(\operatorname{im}{\left(y\right)}\right)^{2}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)} + \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \left(- \left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2} + 1\right)\right) + 2 \left(- \frac{3 \left(\operatorname{re}{\left(y\right)}\right)^{2} \operatorname{im}{\left(y\right)}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}} + \frac{\left(\operatorname{im}{\left(y\right)}\right)^{3}}{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} + \left(\operatorname{im}{\left(y\right)}\right)^{2}\right)^{3}}\right) \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)}$$
x1 = (re(y)^3/(re(y)^2 + im(y)^2)^3 - 3*re(y)*im(y)^2/(re(y)^2 + im(y)^2)^3)*(-re(y)^2 + im(y)^2 + 1) + i*(-2*(re(y)^3/(re(y)^2 + im(y)^2)^3 - 3*re(y)*im(y)^2/(re(y)^2 + im(y)^2)^3)*re(y)*im(y) + (-3*re(y)^2*im(y)/(re(y)^2 + im(y)^2)^3 + im(y)^3/(re(y)^2 + im(y)^2)^3)*(-re(y)^2 + im(y)^2 + 1)) + 2*(-3*re(y)^2*im(y)/(re(y)^2 + im(y)^2)^3 + im(y)^3/(re(y)^2 + im(y)^2)^3)*re(y)*im(y)