Matlab - Ejercicio matlab

clear all

X3=1; X4=8;

vk=-2:0.5:2

syms x

negativas=[ ];

for k=vk

p= (x^3+5*k*x^2+(2*k+(X3+3))*x+(20-X4));

coef=sym2poly(p);

raices=roots(coef);

u=raices<0;

negativas=[negativas; raices(u)  ];

pause(0.3)

end

u=imag(negativas)==0;

vx= negativas(u)'

>> un_cuarto

vk =

   -2.0000   -1.5000   -1.0000   -0.5000         0    0.5000    1.0000    1.5000    2.0000

vx =

   -1.0425   -1.1231   -1.2361   -1.4098   -1.7224   -2.4546   -4.2526   -6.7244   -9.2771

clear all

X3=1; X4=8;

vk=-2:0.5:2;

syms x

negativas=[ ];

for k=vk

p= (x^3+5*k*x^2+(2*k+(X3+3))*x+(20-X4));

coef=sym2poly(p);

raices=roots(coef);

u=raices<0;

negativas=[negativas; raices(u)  ];

pause(0.3)

end

u=imag(negativas)==0;

vx= negativas(u)';

plot(vk,vx)

>> un_cuarto