equation-solving's questions - English 1answer

3.383 equation-solving questions.

I have the following algebraic equation ...

I have a function of trigonometric functions which must be equated to zero in order to obtain the appropriate results. This is done in the following fashion: ...

I'm trying to complete an example from https://reference.wolfram.com/language/ref/InfiniteLine.html Find the intersection of InfiniteLine[{0,0},{1,1}] and InfiniteLine[{{0,1},{1,0}}]: But when I ...

I want to find a smooth continuous function f[x] that satisfies the following for real values of x: ...

I want to find the numbers $a$, $b$, $c$, $d$ so that the equation $$x^4 + a x^3 + b x^2 + c x + d=0,$$ where $d = \dfrac{c^2}{a^2}$ has four distinct integral solutions. With Maple, I found some ...

F1[x_] := NIntegrate[E^Sin[y x], {y, 0, 1}] F2[x_] := Log[x] NSolve[F1[x] == F2[x], x]I want to solve the equation, but Mathematica don't solve it. ...

I have the following notebook (trying to caclulate the pull-in voltage of a structure): ...

My problem is that I am trying to find a Numerical solution to a function of the form f(x,c)== K for x for some given values of c, K, and plot this function over a wide range of values of c. My ...

I tried to run the codes ...

I'm trying to solve a non linear ODE numerically with ParametricNDSolve, but as far as I got is shown below. My problem is to set the find root correctly. What I ...

I am having trouble solving the following differential equation, where $\theta(x)$ is a phase, \begin{equation} \frac{d\theta}{dx} + \sin^2 \left[ \theta(x) \right] + K^2(x) \cos^2 \left[\theta(x) \...

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I am new at Mathematica and have very basic knowledge about it. I want to solve the following equation for variable x in Mathemtica. ...

I have these three equations:1/X + 1/Y == 1/15; 1/Y + 1/Z == 1/20; 1/Z + 1/X == 1/25;I want to calculate the value of expression: ...

I am studying this piecewise function: ...

Below is an ODE with BC define as x[R]=0, x'[0]=0, x'[R]=0 and parameter n. The ODE is stiff at certain data, and I need to see the behavior of x' and x for given ...

I have a polynomial equation: $-(a-ib)e^{(4\pi i/3)}(\sqrt{2}i+x^3/\sqrt{3})x- (a+ib) e^{(2\pi i/3)}(\sqrt{2}ix^3+1/\sqrt{3})=0$ (which in code is): ...

I have a fairly simple program that yields puzzling output. The program is ...

This calculation takes a very long time! Why? How can I improve it? Thanks! ...

I'm trying to solve the Schrodinger equation and having difficulties to define a limitless region because the problem has the Dirichlet conditions at infinity. Maybe I don't need such a region and ...

I want to solve $(ct)^2 = d(t)\cdot d(t)$ for $t$, where $ d(t) = \frac{1}{2}at^2 + vt + r$ Where$ a, v$, and $r$ are all 3-dimensional vectors in Cartesian coordinates. How can I do this?

I have a piece-wise defined function: ...

I'm trying to solve the Schrödinger equation for a hydrogen atom in the Cartesian coordinate system. This is my code ...

In the paper, entitled: A Closed Form Solution for the Pull-in Voltage of the Micro Bridge (Link to PDF: https://pdfs.semanticscholar.org/0d31/33707b1243f6b4e3344c4fa19b831b010b8b.pdf) ... the ...

How can I correctly specify and solve a system of delay difference equations in mathematica similar to NDSolve with regard to delay differential equations? For example if I want to "see" the values ...

I have a very complicated function but only of 1 variable. I want to find the first value for which that function is zero. Mathematica can easily plot it: ...

I have a system of three equations in three unknowns, $k$, $w$, $\theta$. I am interested in solving the system and finding how the variables behave when some parameters change, say $\beta$ and $\...

I am using the following Solve code: ...

So I'm brand new to Mathematica, and basically what I want to do is find the roots of a function at varying time intervals. The function I'm using is: ...

Suppose I want to solve something like:Solve[Sin[2x] == 0]but am only intrested in solutions between a < x < bIs it ...

I am new to Mathematica and I am struggling finding the solution for the following problem. I am studying this piecewise function: ...

I have an question using vector:u = {u1, u2}; v = {v1, v2};$|u|=4$ and $|v|=2$ and $u.v=3$ Find: $(3u-2v).(-u+4v)$ I tried to use some solver, but nothing ...

I have the following function: $$u(x,t)=\sum_{k=1}^\infty\frac{v_0 L}{\lambda_k c \sin\left(\lambda_k\right)}\sin\left(\frac{\lambda_kx}{L}\right)\sin\left(\frac{\lambda_kct}{L}\right)$$ and this ...

I am solving the following symbolic equation. The parameters are of certain ranges, which I specify using Assuming. However the solution presents a list of values, ...

I have an expression as $1 - 2 \sqrt{1 + i r} + i r$, where $r$ is real. I want to find the roots of its imaginary part. So: ...

i have a system of equations in which there are two parameters F, G. I choose F,G positive. the code is: ...

i'm new in the world of mathematica. i have a simple problem : i want to find a solution of a system of equations. The problems are: 1) Is it better to use Solve or Reduce (for this kind of ...

I have problem solving this equation, smallest n such that $1355297$ divides $10^{6n+5}-54n-46$. I tried everything using my scientific calculator, but I never got the correct results(!).and finally I ...

So I was doing my homework and this system popped up, so I was trying to solve it but Mathematica has just been stuck with it for two days. It won't give me an answer. I am trying to get the code to ...

This is my code defining two nonlinear equations. I want to solve them simultaneously. ...

I'm trying to estimate the parameters for the following pair of differential equations ...

Solve and Reduce both can be used for solving equations. Just by working with them, I know there are some differences between ...

I would like to use low precision data (based on measurement results with a low precision) to solve a set of inequalities. I have prepared a minimum working example to demonstrate the issue. I am ...

I have a problem to calculate implicit equation in Mathematica, as follows: $$ \theta_1=\arctan\left[\frac{u_2A_2}{u_1A_1}\tan(\phi-\theta_1)\right] $$ My data are as follows: ...

I've generated this expression ...

Problem statement: I'm currently new to Mathematica and have been trying to solve this problem. I was digging around and found this code: ...

I am looking to plot the function f[x, y] f[x_?NumericQ, y_?NumericQ] := Cos[x + y]/Sqrt[1 - y^2]where ...

Hi I'm trying to visualize a 2D equation that I have previously solved as I vary a parameter 'b'. First I solve for 'y' in terms of 'x' and 'b', then I intend to use Manipulate. ...

I want to find the zeros of some nonlinear function in a certain range, say $f(x)=x^4+\frac{x}{1-x}-c$. If I enter ...

I am trying to solve a set of recurrence equations as given below: $p_{1, n}*(l + n*u1) = p_{1, n-1}*l + p_{1, n+1}*(n+1)*u1 + p_{2, n}*u2$, $p_{2, n}*(l + n*u1 + u2) = p_{2, n-1}*l + p_{2, n+1}*(n+...

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