Unrecognized function or variable 'x'.
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello.
I don’t understand why I don’t have x defined after running the code, if initially it says errors. Help me please
function F=M36(x)
F=[3*x(1)*x(2) - x(1)^2 - x(2)^2 - 5;
7*x(1)^2 * x(2)^2 - x(1)^4 - x(2)^4 - 155];
options = optimoptions('fsolve','Display','iter');
[~,~] = fsolve(F,[-4,0],options);
[~,~] = fsolve(F,[0,4],options);
disp('Plotting graphs of the left sides of the system equations:')
x=-5:0.1:5;
y= (3/2).*x+ sqrt((13/4).*x.^2+5);
plot(y,x,'b')
hold on
x=-5:0.1:5;
y = sqrt((x^4 + 155) / (7*x^2 - y^2));
plot(y,x,'b')
hold on
grid on
legend('Graphic solution');
end
3 commentaires
Walter Roberson
le 16 Nov 2023
syms x [1 2]
eqns = [3*x(1)*x(2) - x(1)^2 - x(2)^2 == 5;
7*x(1)^2 * x(2)^2 - x(1)^4 - x(2)^4 == 155]
sol = solve(eqns)
subs([x1, x2], sol)
Réponses (1)
Walter Roberson
le 16 Nov 2023
F = @(x)[3*x(1)*x(2) - x(1)^2 - x(2)^2 - 5;
7*x(1)^2 * x(2)^2 - x(1)^4 - x(2)^4 - 155];
0 commentaires
Voir également
Catégories
En savoir plus sur Calculus dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!