I was trying to Plot a function using Plot3D function but failed. I can’t understand what’s the feedback mean.
Please tell me what i did wrong.
Thank you very much!
Could you post perhaps the code? This is very unhandy for anyone who wants to help! Please update your post.
Yeah I think I posted a picture with some code. That’s all I have right now
What you should do is to put your code in the form to run any mathematica, in that should make it using the buttons which are in the bar that I show you,
I hope that my explanation is understandable.
The result should be something like the following
(1/5)*Integrate[Sin[Pi*x - 4 Pi]^2*Sin[n*Pi*x/10], {x, 4, 5}];
A[n_] := -((400 (Cos[(2 n \[Pi])/5] - Cos[(n \[Pi])/2]))/(
n (-400 + n^2) \[Pi]));
A[20] := 0;
u[x_, t_, w_] := Sum[A[n]*Cos[n*Pi*t/5]*Sin[n*Pi*x/10], {n, 1, w}];
And as you’ll see images are obtained as the following
