Questions tagged [equation-solving]
Questions on the analytic and numerical equation solving functions of Mathematica (Solve, Reduce, NSolve, FindRoot, DSolve, RSolve, etc.).
6,863 questions
1 vote
0 answers
44 views
4 votes
2 answers
292 views
Mathematica does not give me any contour here
I would like to have an idea what kind of curbe is being formed from the intersection of the plane $x+y+z=9$ with the surface $\sqrt{16-x^2}+\sqrt{25-y^2}+\sqrt{36-z^2}=12$ under the restriction $x,y,...
- 634
4 votes
2 answers
228 views
How to find x ranges where a function is one-to-one and its output is in a given range?
I have a list of functions like this: ...
- 1,409
2 votes
2 answers
206 views
How should we formulate angle geometry constraints in Mathematica to help the solving system work more efficiently and speed up the solution process?
Quadrilateral $ABCE$ is a parallelogram. Point $D$ lies on segment $AE$. The diagonals of quadrilateral $ABCD$ intersect at point P. If $△ABP∼△CBD$ and $AB<BC$, find the ratio $\frac{AB}{BC}$. The ...
- 345
2 votes
1 answer
133 views
How can I add inequality constraints to Solve? [closed]
How can I add constraints to the Solve function? For example, I tried: ...
- 1,409
1 vote
0 answers
61 views
Using symbolic expression in Compile
I found a Mathematica notebook on the internet, which calculates the inverse kinematics of a 6DoF robot. link to the notebook In one part of the code it gives a symbolic expression using the Solve[] ...
- 11
10 votes
3 answers
461 views
How to make DSolve obtain this solution to this IVP first order ODE?
V 14.3 can not solve this IVP(Initial value problem) first order ode from textbook ...
- 156k
0 votes
1 answer
123 views
Why is the Backsubstitution not working in Reduce in this case?
In the following system why is the Backsubstitution not working: ...
- 10.4k