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Results tagged with equation-solving
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user 65779
Questions on the analytic and numerical equation solving functions of Mathematica (Solve, Reduce, NSolve, FindRoot, DSolve, RSolve, etc.).
2
votes
2
answers
92
views
Command to know when it become constant
So I got this equations and I want to know if there is a command to know when the function becomes constant and obtain that value, this is my code and I know that approximately at 2600 both functions …
- 303
1
vote
1
answer
52
views
NDSolve How do I insert another boundry condition
So I'm new to programming and I am trying to solve a very simple differential equation (i can do this by hand but the thing is i can't program it), the equation is a'[t] == - 0.0118, with the boundary …
- 303
2
votes
2
answers
70
views
Obtaining the other axis value
I'm new at coding and I got this simple differential equiation and the plot of this function involved, I can obtain the value of the dependant variable based on the independant varible as usual, what …
- 303
0
votes
1
answer
51
views
How to refer a solve answer to NDsolve [closed]
I don't know how to refer a solution of Solve to compute it in NDSolve, here's my code
acu = FullSimplify[D[\[Rho] \[Pi] (5 a^2 - a^3/3), a]]/.a->a[t];
ode = Solve[acu/(\[Pi] \[Rho]) a'[t] == -0.01123 …
- 303
1
vote
1
answer
32
views
Read the graphic at another value
So I got this code and I'm new at coding, what I want to do is just read the graphic at a value of the Y axis and get the value of the X axis
sol = NDSolve[{a'[t] == (0.16 - 0.0622 Sqrt[a[t]])/(Pi (a[ …
- 303
2
votes
0
answers
67
views
How to change the size of the y axis
I got this code but the solution is very tight in the Y axis, I wanna know how can I change the scale or the size of the Y axis and how can I obtain its solution cause it's not as simple as sol/.t->n. …
- 303