hwo can i fix the errors below

2019 2 24
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更新时间：2019 2 27
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madhan ravi
madhan ravi 2019-2-24
upload your code
Abdulrahman Al Ali
Abdulrahman Al Ali 2019-2-24
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
madhan ravi 2019-2-24
编辑：madhan ravi 2019-2-24
Why have you added a C(I know arises after integration) ?
Abdulrahman Al Ali
Abdulrahman Al Ali 2019-2-24
编辑：Abdulrahman Al Ali 2019-2-24
yes, its what we do after integrating?
Abdulrahman Al Ali
Abdulrahman Al Ali 2019-2-24
I already tried removing C it didnt fix my problem

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Naman Bhaia
Naman Bhaia 2019-2-27

0 个投票

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.

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