Have atached a question in a worksheet. Thanks for your help :-)

Yours

Gustav

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Hi !
(Scuse me for my English, I'm French...)


How can I solve a system of 3 nonlinear differential equations of the second order  with Maple ?

(Like this one : http://physique-ricochet.societeg.com/images/equationsMvt.jpg  where Z, X and teta are the variables). So the variables are dependent.

I've started trying with Maple Help to solve the system composed of the first two equations and making teta a constant, but it gives me back :

ok, I have the following code but I want the Maplet to remain when I click on Ok (I only want it to plot and not shut down so I can

select more options from the list and plot more) so this Shutdown(['D1']) command should be removed but I dont know

what I should have there instead ?

Is there a convenient way to express a 2nd or higher derivative, say in an eval statement, so that it is not confused with an expression containing an exponent?

how do i find the singular value decoposition of a matrix in maple 12
i need the left and right singular vectors as well as the singular values

Hi, I'm supposed to find the center and radius of the circle given by the equation: 2x^2+2y^2-6x+10y=1. I know I'm supposed to complete the square first but i'm not sure of the process

Hello, I've been having trouble plotting multiple hyperbolas of the for xy=c on the same plot. Basically I'm supposed to plot several hyperbolas of that equation when c=+-1,+-2,+-3 on the same plot. If anyone can help i'd really appreciate it. ^^;;

how do I use maple 12 to solve this equation

I need help please

y"  + y = f(t) , where f(t) =        0,    0<= t < pi

                                                   1,   pi <= t < 2pi, y(0)  = 0 , y ' (0)  1

hi everybody.

i want to know what command convert "exp" to "hyperbolic functions".

for ex :    e^(x)+e^(-x)  -->  2cosh(x)

please help me.

Hi everyone,

does anyone know how to use the LagrangianMultipliers function so that the solutions obtained will be the closest integer smaller than whatever the output is for each entry in the list.

e.g.

LagrangeMultipliers(x1*x2*x3*x4*x5*x6*x7, [x1+x2+x3+x4+x5+x6+x7-32, x1^2+x2^2+x3^2+x4^2+x5^2+x6^2+x7^2-160],[x1,x2,x3,x4,x5,x6,x7]);

will give us entries which are not integers, and if i use other conditions I will sometimes not receive any integer solutions - which is to be expected.

Any help would be warmly received.

Thanks,

Alex

I recently ran into an interesting twist on the infamous Maple anti-pattern:

# A very garbagey way to build a list
l := [];
for i from 1 to 10000 by 100 do
    l := [op(l), isqrt(abs(floor((5000-i)/2)))];
end do;

A lot of users fall prey to this method of building a list rather than using :

# generate a list without extraneous garbage
l := [seq(isqrt(abs(floor((5000-i)/2))),i=1..10000,100)];

Hello,

some time ago I have developed a procedure for nonlinear regression in Maple 9 that worked perfectly. Upgrading to Maple 12, the code still works well, except for the part in which I plotted the experimental datapoints and the calculated curve:

Hello,

I have two functions:

Gx(x)=0.025+(x^2)/40

Hxi(x)=0.006+0.5*x^2

with values I'd like to add

Fx(x)=Gx(x)+Hxi(x)

and plot new function

I use

F=plot(Fx(x),x=0..2)

G=plot(Gx(x),x=0..2)

H=plot(Hxi(x),x=0..2)

then:

display(F,G,H)

But it doesnt work. Then when I displaed

By the way, Hxi are correction, in function of x.

The second problem with I have is with ploting.

Hi, Can someone please tell me how to plot the region