Hi.

1) I am new to Maple TA and would like to ask a question about question respository. I go to: Class_Homepage >> Content_Manager >> Question_Repository >> Questions >> New Question. I then creare a (multiple-choice) question. In the end I click "submit". Where are these questions stored and how can they be accessed?

When I go to the repository, I do not see any questions there. 

When...

working_nonlinear.mw helo guys having problem in plotting graph. Please help me out

I want to find the parameters m to the  equation x^4 -(3*m+2)*x^2 + 3*m+3 = 0 has four distinct solutions and all of them were less than 2. I tried

eq:= x^4 -(3*m+2)*x^2 + 3*m+3:

sol:=[solve(eq=0,x)]:

d:=discrim(eq,x):

solve([d>0,sol[1]<2,sol[2]<2,sol[3]<2,sol[4]<2],m):

allvalues(%);

How to reduce my code?

Hi,

I need to expand a function of the form {[1]}.{[2]}.({[2, 3]}-{[3, 2]}).({[1, 3]}-{[3, 1]}), where '.' is for non-commutative multiplication. I need to get  {[1]}.{[2]}.{[2,3]}.{[1,3]} - {[1]}.{[2]}.{[2,3]}.{[3,1]} - ... (the order of matters).

Maple has a command 'expand', but that only works for normal products. eg. {[1]}*{[2]}*({[2, 3]}-{[3, 2]})*({[1, 3]}-{[3, 1]}).

Any help appreciated!

I am dealing with second order linear differeantial equations for RLC and forced RLC circiuts.

I am having trouble with plotting a solution curve in the phase plane.

> restart;

with(plots); with(DEtools);

L := 10; R := 20; C := 1/100;

de1 := diff(x(t), t) = y(t);

de2 := L*(diff(y(t), t))+R*y(t)+x(t)/C = 0;

DEplot({de1, de2}, [x(t), y(t)], t = 0 .. 5, [[x(0) = 10, y(0) = 0]], stepsize = 0.5,

Maple people:

The title is the question.  I defined a function in Maple, which works.  I am trying to get Maple to compute its derivatives.  I want to save the derivatives as functions.  Here is a code snippet.  The function itself works.  I have uploaded the worksheet.  Mapleprimes seems to have copied the entire worksheet into this question when I uploaded the worksheet. 

[begin code snippet]

Does anyone know if Maple has a counterpart to the Wolfram Lightweight Grid Manager that can be used with Maple 14 or Maple 16?

Hi

In earligere versions of maple (14 and 15) I yoused this code (program) to plot the area between functions, but it does not work in maple 17 (or 16).

integralplot2:=proc(f1,f2,a,b,{[color, colour] := blue,transparency := 0.5,numpoints:=500})     

local mingr,maxgr,variable,p,c,n,pts1,pts2,polys,i,xkoor,ytop,ybottom,yvals,plotf1,plotf2;          

if evalf(a)<evalf(b) then       

Hi

i want to find the eigenvalues of this system of two equations with two unknowns:

2.097*k = .9525000000*k^.35-2.2225*b/k^.65+.2 and

(2.097-2.0955/k^.67)*b = -.2

How i can do this in Maple?

Any help will be appreciated

I would like to determine the sign of a derivative of a function where I would make some restrictions on parameters and variables (e.g. larger zero). If a sign is not unambiguously possible, I would like Maple to give me an expression (threshold) for when the derivative is positive or not.

I would be very thankful for any hints!

(Notice: I am a Maple beginner!)

Best,

Max

Hello,

I would like to know if it is possible to redefine a function.

Let's say I have assigned one variable the following value:

e:=f(x,y,t) where f(x,y,t)

Later after some calculations I find that f(x,y,t) no longer depends on the parameter y so should be f(x,t).

Is it possible to pass the changes to "e" without having to actually rewrite the expression of "e"?

Hello I have the following system of equations and I want to solve for rho1 and z1

E := (1/2)*(1/rho1^2+1/rho1^2)-1/sqrt(z1^2+rho1^2)-1/sqrt((R-z1)^2+rho1^2)-1/sqrt(z1^2+rho1^2)-1/sqrt((R-z1)^2+rho1^2)+1/R+1/sqrt((2*rho1)^2+(R-2*z1)^2);

Er1 := diff(E, rho1);

Ez1 := diff(E, z1);

solve([Er1, Ez1], {z1, rho1});

The system is a function of R.

The solve command spits out Kernel lost after some time. So my question is how can I solve it ?

My version is maple 13. I tried to find out how to solve system of linear equations like A*X=b, whre A is a matrix and X and b is a vector, the solution is X:=linsolve(A, b),

But, the system just return the formula of linsolve(A,b) where it replace A and b by their forms of matrix. Simplely , the software doesn't show the result. I tried also evalm(linsolve(A,b)) , but it just return dezens of linsolve(a,b).

There seems to exist no such facility with Maple 17, although that was present for Maple 16, 15, ...  and it seemed to be useful. Please explain its absence.

hey friends please check this code and help me in removing errors. working_nonlinear.mw