hwo can i fix the errors below

[madhan ravi]

upload your code

[Abdulrahman Al Ali]

syms x u C

f = (-1/3) * exp(-3*x);

u_of_x = (1/3)* (x^3);

du = diff(u_of_x);

divide_dx = f/du;

f_of_u = subs(f,x,u_of_x);

F_of_u = int(x^2 * exp(-(x^3)))+C

F_of_u=subs(F_of_u,u_of_x,u);

F=subs(F_of_u,u_of_x,u);

Falt = int(x^2 * exp(-(x^3)))+C

[madhan ravi]

Why have you added a C(I know arises after integration) ?

[Abdulrahman Al Ali]

yes, its what we do after integrating?

[madhan ravi]

Just remove C.

[Abdulrahman Al Ali]

I already tried removing C it didnt fix my problem

Answer 1

[Naman Bhaia]

Hey Abdulrahman,

Based on what I can understand I think there is a logical error in the 15th line of your code. F_of_u is a function of x and not u_of_x. Therefore there is nothing the subs command can replace. Also if needed you can refer to the documentation for the subs() function.