# Questions tagged [equation-solving]

Questions on the analytic and numerical equation solving functions of Mathematica (Solve, Reduce, NSolve, FindRoot, DSolve, RSolve, etc.).

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### Solve is not working with this equation

I was trying to solve this equation and Mathematica 12 keeps trying but does not give an answer. Is it a glitch in my system or something wrong with Mathematica 12? ...
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### NSolve gives weird result for $n=101$ with NSolve[$\frac{d}{dx}\prod \limits_{k=1}^n (x-k)$==0,x]

Coming from this post: What would be the roots of the derivate of this polynom I did a quick check with Mathematica and arrived at a wrong result. I was initially confused but chose to trust ...
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### Evaluation functions with lower and upper limit ODE?

How do I find the numerical value of y at 0 and also at 1. Here is my code. I appreciate any help. ...
170 views

### Simple Solve[{y == 5 + 2 x + x^a}, {x}] not working?

I am trying to find a general expression for x, for the following equation y = 5 + 2 x + x^a, but Solve cannot accomplish this. ...
179 views

### How to solve this differential equation analytically?

How can I DSolve the following differential equation? Is there an analytical answer to this equation? ...
35 views

### How to find closed form expression for a particular variable?

Is it possible to get a closed-form expression for variable W in the expression given in the figure using mathematica. Please guide me as I have been stuck in this problem for quite some time.
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### Reduce is not working for my equation

Can anybody help me? Reduce[{Cos[Sqrt[w]]*Cosh[Sqrt[w]]*L == 1, w > 0}, w] This procedure takes a long time and is not working. Can anybody help me?