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-2
votes
0answers
26 views

Dsolve returning same input [on hold]

I have to solve an ODE so I am listing the variables and then i want to use Dsolve. I type the following into an empty notebook. ...
0
votes
0answers
39 views

DSolve Solution Missing Obvious Simplifcations [closed]

I'm just starting to use Mathematica. I'm trying to solve an inhomogeneous second-order ODE, of the form x''[t] + 2 * x'[t] + x[t] == -Exp[I * w * t]. and others of the same form. The solution I ...
0
votes
0answers
32 views

DSolve solution has redundant terms, making a simple solution needlessly long [closed]

I'm using DSolve to solve a differential equation. It is giving the correct solution, but there are many terms that, when added together, sum to zero. The inclusion of these terms makes the solution ...
6
votes
2answers
161 views

Solving with DSolve recursively

I need to find $f(x,n)$ in the interval [0,1] defined by recursion, \begin{equation} \frac{d f(x,n+1)}{dx} = f(x,n) \end{equation} with boundary conditions $f(0,n+1) = 1$ and $f(x,0)=1+ x $ Using ...
4
votes
2answers
50 views

DSolve results not what expected

I have the following formula: s'[t] == 230.94 Tan[0.914743 - 0.138564 t] When I solve this by hand I get: ...
0
votes
1answer
48 views

DSolve not returning “trivial” solutions [duplicate]

When I enter this DSolve[y'[x]^2 + y[x]^2 == 1, y[x], x] the answer I get is ...
0
votes
2answers
67 views

Solve simple differential equation - Error?

I get the error "The function Te appears with no arguments." when running this code. I'm not sure why. Is it because of the $Abs[\Gamma]$ ? ...
0
votes
1answer
99 views

Problem with NDSolve

I'm solving a PDE that is partially elliptic. So I need to solve the equation iteratively. My problem is at the end of the code. I'm doing interactions manually in order to evaluate the code. At the ...
6
votes
2answers
150 views

Problem when defining function through NIntegrate and NDSolve and Interpolation - Bug?

More than a single question, I have some doubts about the output of certain functions when defined through the result of other calculations. I am an active user of Mathematica, but maybe I haven't ...
-1
votes
1answer
57 views

How to get solution from DSolve

How to get the solution from DSolve in such way that there is no need to copy the result. When for example solving: ...