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I have four equations:

eqs:={8x-5z=0, -5y-2x=0, 2z-8y=0} and 13x-4y+9z=1

I've been trying for the past hour to solve both equations for x, y, and z and have not been successful.

What commands do I use to solve this problem?

Integral solutions...

February 16 2012 toandhsp 205
I want to find all integral solution of the equation x =
Pi/9+2*k*Pi/3, where k is integral numbeer and 1 <= x <=2^Pi. 
This is my code. 
restart; solve([Pi/9+2*k*Pi/3 >=1,Pi/9+2*k*Pi/3 <=2^Pi],k);

> evalf(%);

> f:=k->Pi/9+2*k*Pi/3;

> seq(f(k),k = 1..4);

Please help me another way. Thank you.

Please write for me a code this problem.

Write the equation of the plane passing through the two points A(1,-2,4), B(3,5,-1) and make a least angle with the plane x + y + z + 1 = 0.

Thank you very much.

Let A(2;-2;3), B(4;-5;6) and (M(1;2;3) be three points. Write the equation of the plane (P) passing through two points A and B 

Equation of a plane...

January 20 2012 toandhsp 205

Write the equation of a pane (P) which passes through the point E(2,1,0) and F(1,2,1) such that distance from the point A(1,-2,-1) to the plane (P) twice distance from the point B(2,4,3) to the plane (P).

My main idea is based on, if the line (d) passes through...

Fit of an equation...

January 18 2012 Marcelo 0

I am learning about programming; I have this equation:


The values of t, E are a list of values.

and K2 alpha and beta are unknown but i dont know how to do for graph the part of ln vs time and fit it to a line.


I'm trying to solve the following system in Maple but it doesn't show me any solution:

2*(1-a1^2)*x(t)*y2(t) - 2*k*(1-a1*a2)*(x(t)^2)=m


where x(0)=0 and y2(0)=0 , k>0,...

I have a system of three non-linear coupled ODEs. I am trying to obtain the zeroth order, first order and second order equations and their boundary conditions using the perturbation technique. I then need to solve them. I wrote the following MAPLE lines for the purpose.

restart; N := 2

Eq[1] := diff(f(eta), `$`(eta, 3))+(m+4)*f(eta)*(diff(f(eta), `$`(eta, 2)))-(2*(m+1))*(diff(f(eta), eta))^2-(2*(m+1))*h(eta)-(.5*(m-2))*eta*(diff(h(eta), eta))

Eq[2] := g(eta)-(diff(h(eta), eta))


I need help of your expertize in solving the following queries:

I would start with a sample equation:

Eq1 = u_{xxxx} + u_{xxyy} - v_{xxxy} - v_{xyyy}
where u_{xxxy} represents 4th order pde of u i.e. d^4/(dx^3 dy).

I get a equation similar to Eq1 (but quite complicated) on solving the
equilibrium equations. I would like to collect the similar derivatives
for variable u and v together like

Eq2 = d^2/d x^2 ( u_{xx} + u_{yy} ) - d^2/dx dy ( v_{xx} + v_{yy} )




I have seven curves (expressions) R:=f(x) for different value A.

1. How to Plot all curves on one 3D spece plot?
2. Hot to get (fit) surface equation R:=f(x,A) from all 2D curve? 



Hey there, this is my first post here, so hello to everyone.


I have (so far) one question. I have a circle equation like


I know, that on a paper, I can convert it to the "normal" circle equation, from which I can read the middle point and radius of the circle. And now my question is, how to convert in in maple? I am using the 11th version.


I have tried solving this equation and (x-a)

When I use the solve command in Maple15 nothing happens. I just want to solve for V and Cf.

Does maple not like implicit equations? The file is attached

 It is the mathematica code for bifurcation diagram of the model that i am working with now. is there anybody who can translate it into maple code? or does anyone can help me with making a bifurcation diagram for such a ODE system in maple??


Thanks in advance


Let's say if given a expression y(x)=1/x+sinx, how to find the equation which y(x) satisfies by using Maple?

How can i trunc (find closest integer) each element in a matrix ? 

This is my matrix equation:

for n to 20 do 'CD'^n, 'F' = evalf(C[1].D[1]^n.F[1]) end do

And i want to show  "trunced" results

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