dsolve command doesn't work :(

it's very important =\

y*(dy/dx) + 2b*y*|y| + x*k^2 = 0

I'm new to Maple and am trying to solve a set of simultaneous equations. The equations have two independent variables x and T (contained within the letters "a" to "l" and "G" in code below) and 5 dependent varaibles X,Y,Z,W,V. Ultimately I want to solve for X...V with various values of x and T, but at the moment I'm struggling to get my code to work for just one x and one T value. The code I have so far is:

> solutions := solve({0 = -a*(h-Y-X-Z-V+W...

Dear guys! My question is: "how can I evaluate x when I fix y for an example equation y:=x+x^2". for each value of x we have a value for y. we can obtain it for example with "eval". but how about in this case?

Thanks

I have a maple exercise where it ask me to find the limit of a sum, here what's I type

f:= 2*k/(2*k+11);

g:= sum(f,k=1..n);

limit(n^(11/2)*g,n=infinity);

It spit out the answer infinity

but the answer is 10395/64*Pi^(1/2), can anyone tell me what am i doing wrong

   We have four points A, B, C, E, which form a convex polygon in the plane Π, and a point S, which doesn't belong to  Π. The points A, B, C, E, and S form a pyramid. The following distances are measured with some error: |AB|=2.9, |BC|=4.43, |CE|=5.10, |EA|=5.2, |AC|=2.29, |BE|=3.17, |SA|=3.77, |SB|=4.27, |SC|=3.66, and |SE|=4.36. In fact, there doesn't exist a pyramid with exactly these distances. The problem arises: to find the numbers XAB, XBC, XCE,...

Hey there, I am trying to plot R0 vs x with my output of a loop. Just wondering how I go about this and I am not very coding savvy, so my apologies. My code is below.

for Lambda from 40 to 80 do R0 := eval(R[0], {mu = m, delta = del, gamma = g, omega = o, d[1] = dk, d[2] = dc, alpha[1] = ak, alpha[2] = ac, beta[1] = b1, beta[3] = b3}); qq := eval(Y, {mu = m, delta = del, gamma = g, omega = o, d[1] = dk, d[2] = dc, alpha[1] = ak, alpha[2] = ac, beta[1] = b1, beta[3] = b3}...

Can one perform animation using the data file.

I want to animate the graph betweeen two variables say x and y, which I have stored in a data file. Does maple support any such operation?

So i need to plot 4*x-x*y^2 = 5 and (1/3)*x^3+y^2 = 1 between x = -10 .. 10, y = -10 .. 10.

I tried:

> f := 4*x-x*y^2 = 5;
                         
> g := (1/3)*x^3+y^2 = 1;
                       

   > plot({f, g}, x = -10 .. 10, y = -10 .. 10)

What did i do wrong?

Thanks

Hi,

I am using Maple 14 full eddition (not classic) to represent some equations. I require Maple to calculate the summ from 1 to n of the odd terms only. Below is what I have developed so far off all terms in the series.

Can anyone assist in changing it to odd terms only?

Kind regards,

John
Australia

I've got Maple15 and was trying to use the new feature MarkovChain from Finance library. But I got the error Finance.dll not found. What am I supposed to do?

i want to integrate dbeta at the bottom of the following code, however, it said wrong number of argument. Why ? how to correct it the to integrate it successfully?

Af := ft + f1*dX + f2*dv + 1/2*f11*dXt + 1/2*f22*dvt + f12*dXvt;
Af := subs(dX = (miu - v/2)*dt, Af);
Af := subs(dv = a*(b - v)*dt, Af);
Af := subs( dXt = v*dt, Af);
Af := subs( dvt = v*(rho^2)*dt, Af);
Af := subs( dXvt = rho*p*v*dt, Af);

Af := subs( ft = (dalpha*y + dbeta)*f, Af);

Hi all,

I am interested to find documentation from internet in using Maplesim for power electronics simulations. Like Gradators and frequency variators etc...

I can not find any documentations.

Could you if exist any web site for modeling in power electronics and perhaps with Maplesim

Thanks in advance for any help

Kamel

My goal is to find a way to code sliders that set parameters for a plot so that it is not necessary to re-code all of the existing sliders when a new one controlling the same plot is added.

The closest I've come is the following.   Say I've defined a couple of functions

f:= (A,x) ->  sin(A*x);

g := (B,x) -> cos(B*x);

and

plot0 := plot([f(A,x),g(B,x)],x=a..b,color[blue,red]);  

And two sliders with code for action

I want to use the Bits package, but have troubles - may be a bug?

I do not understand the following (Maple 15), where the help says "The And
command computes the bit-wise logical and of the inputs ... "

  with(Bits);
  Settings(defaultbits=4); # poor help text for that ...

  4; Split(%);
                     ...

Hello.i want animate the circle of radius 2 on the parabola y=x^2-30*x in the interval [-1,2].I wrote like that =animate(plot,[[-30*t+2cos(Phi),t^2+2sin(Phi)],Phi=0..2*Pi],t=-2..1) .But it doesn't work.What is wrong?