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3.80=y*(1-4/3*x+1/3*(x^4)) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
         /           4\
         |    4*x   x |
19/5 = y*|1 - --- + --|
         \     3    3 /
$$\frac{19}{5} = y \left(\frac{x^{4}}{3} + \left(1 - \frac{4 x}{3}\right)\right)$$
Solución detallada
Tenemos una ecuación lineal:
(19/5) = y*(1-4/3*x+1/3*(x^4))

Abrimos los paréntesis en el miembro izquierdo de la ecuación
19/5 = y*(1-4/3*x+1/3*(x^4))

Abrimos los paréntesis en el miembro derecho de la ecuación
19/5 = y1-4/3*x+1/3*+x+4)

Sumamos los términos semejantes en el miembro derecho de la ecuación:
19/5 = y*(1 - 4*x/3 + x^4/3)

Transportamos los términos libres (sin y)
del miembro izquierdo al derecho, obtenemos:
$$0 = y \left(\frac{x^{4}}{3} - \frac{4 x}{3} + 1\right) - \frac{19}{5}$$
Dividamos ambos miembros de la ecuación en 0
y = -19/5 + y*(1 - 4*x/3 + x^4/3) / (0)

Obtenemos la respuesta: y = 57/(5*(3 + x^4 - 4*x))
Resolución de la ecuación paramétrica
Se da la ecuación con parámetro:
$$\frac{19}{5} = y \left(\frac{x^{4}}{3} - \frac{4 x}{3} + 1\right)$$
Коэффициент при y равен
$$- \frac{x^{4}}{3} + \frac{4 x}{3} - 1$$
entonces son posibles los casos para x :
$$x < 1$$
$$x = 1$$
Consideremos todos los casos con detalles:
Con
$$x < 1$$
la ecuación será
$$\frac{19}{5} - y = 0$$
su solución
$$y = \frac{19}{5}$$
Con
$$x = 1$$
la ecuación será
$$\frac{19}{5} = 0$$
su solución
no hay soluciones
Gráfica
Respuesta rápida [src]
                                 /      4        4                    2      2   \                                                            /              3                3         \                           
                              57*\3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/                                                       57*I*\4*im(x) - 4*re (x)*im(x) + 4*im (x)*re(x)/                           
y1 = ------------------------------------------------------------------------------------------------------ + ------------------------------------------------------------------------------------------------------
       /                                            2                                                    2\     /                                            2                                                    2\
       |/               3                3         \    /      4        4                    2      2   \ |     |/               3                3         \    /      4        4                    2      2   \ |
     5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /   5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /
$$y_{1} = \frac{57 i \left(- 4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} + 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} + 4 \operatorname{im}{\left(x\right)}\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)} + \frac{57 \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)}$$
y1 = 57*i*(-4*re(x)^3*im(x) + 4*re(x)*im(x)^3 + 4*im(x))/(5*((4*re(x)^3*im(x) - 4*re(x)*im(x)^3 - 4*im(x))^2 + (re(x)^4 - 6*re(x)^2*im(x)^2 - 4*re(x) + im(x)^4 + 3)^2)) + 57*(re(x)^4 - 6*re(x)^2*im(x)^2 - 4*re(x) + im(x)^4 + 3)/(5*((4*re(x)^3*im(x) - 4*re(x)*im(x)^3 - 4*im(x))^2 + (re(x)^4 - 6*re(x)^2*im(x)^2 - 4*re(x) + im(x)^4 + 3)^2))
Suma y producto de raíces [src]
suma
                            /      4        4                    2      2   \                                                            /              3                3         \                           
                         57*\3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/                                                       57*I*\4*im(x) - 4*re (x)*im(x) + 4*im (x)*re(x)/                           
------------------------------------------------------------------------------------------------------ + ------------------------------------------------------------------------------------------------------
  /                                            2                                                    2\     /                                            2                                                    2\
  |/               3                3         \    /      4        4                    2      2   \ |     |/               3                3         \    /      4        4                    2      2   \ |
5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /   5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /
$$\frac{57 i \left(- 4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} + 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} + 4 \operatorname{im}{\left(x\right)}\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)} + \frac{57 \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)}$$
=
                            /      4        4                    2      2   \                                                            /              3                3         \                           
                         57*\3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/                                                       57*I*\4*im(x) - 4*re (x)*im(x) + 4*im (x)*re(x)/                           
------------------------------------------------------------------------------------------------------ + ------------------------------------------------------------------------------------------------------
  /                                            2                                                    2\     /                                            2                                                    2\
  |/               3                3         \    /      4        4                    2      2   \ |     |/               3                3         \    /      4        4                    2      2   \ |
5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /   5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /
$$\frac{57 i \left(- 4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} + 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} + 4 \operatorname{im}{\left(x\right)}\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)} + \frac{57 \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)}$$
producto
                            /      4        4                    2      2   \                                                            /              3                3         \                           
                         57*\3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/                                                       57*I*\4*im(x) - 4*re (x)*im(x) + 4*im (x)*re(x)/                           
------------------------------------------------------------------------------------------------------ + ------------------------------------------------------------------------------------------------------
  /                                            2                                                    2\     /                                            2                                                    2\
  |/               3                3         \    /      4        4                    2      2   \ |     |/               3                3         \    /      4        4                    2      2   \ |
5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /   5*\\-4*im(x) - 4*im (x)*re(x) + 4*re (x)*im(x)/  + \3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/ /
$$\frac{57 i \left(- 4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} + 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} + 4 \operatorname{im}{\left(x\right)}\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)} + \frac{57 \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)}{5 \left(\left(4 \left(\operatorname{re}{\left(x\right)}\right)^{3} \operatorname{im}{\left(x\right)} - 4 \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{3} - 4 \operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)}$$
=
     /      4        4                    2      2          /      3        2         \      \ 
  57*\3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x) + 4*I*\1 - re (x) + im (x)*re(x)/*im(x)/ 
-----------------------------------------------------------------------------------------------
  /                                                 2                                 2       \
  |/      4        4                    2      2   \       /      3        2         \    2   |
5*\\3 + im (x) + re (x) - 4*re(x) - 6*im (x)*re (x)/  + 16*\1 - re (x) + im (x)*re(x)/ *im (x)/
$$\frac{57 \left(4 i \left(- \left(\operatorname{re}{\left(x\right)}\right)^{3} + \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{2} + 1\right) \operatorname{im}{\left(x\right)} + \left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)}{5 \left(16 \left(- \left(\operatorname{re}{\left(x\right)}\right)^{3} + \operatorname{re}{\left(x\right)} \left(\operatorname{im}{\left(x\right)}\right)^{2} + 1\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} + \left(\left(\operatorname{re}{\left(x\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(x\right)}\right)^{2} \left(\operatorname{im}{\left(x\right)}\right)^{2} - 4 \operatorname{re}{\left(x\right)} + \left(\operatorname{im}{\left(x\right)}\right)^{4} + 3\right)^{2}\right)}$$
57*(3 + im(x)^4 + re(x)^4 - 4*re(x) - 6*im(x)^2*re(x)^2 + 4*i*(1 - re(x)^3 + im(x)^2*re(x))*im(x))/(5*((3 + im(x)^4 + re(x)^4 - 4*re(x) - 6*im(x)^2*re(x)^2)^2 + 16*(1 - re(x)^3 + im(x)^2*re(x))^2*im(x)^2))