As usual happens in symbolic calculations - small change of input parameters leads to drammatical change in consuptions. I had talk about many other partial issues in  this forum. Many other issues i just tried myself without any success (for example try convert(exp(x)+x, FormalPowerSeries)) and now i must take decision: wheather or not to continue work with maple at all. It's totally clear for me that others (like Wolfram mathematica) not much better. Only one other...

The domain of the function sqrt(16 - x^2) is -4 < (or equal to) x < (or equal to) 4, but how would I go about finding the domain in Maple? Thanks!

Maybe many questions on forum because method is not universal. What about this one:

JA1S := (2*sqrt(2*y+3)*y+3*sqrt(2*y+3)-3*sqrt(3))/((2*y+3)^(3/2)*y);

simplify(JA1S, power, radical, symbolic); - nothing

combine(JA1S, power, radical, symbolic); - nothing

Moreover, can i somehow also reduce by y?

I would like to know how does Maple evaluate a geometric functions with evalf.

e.g.

> evalf(sin(Pi/12));

                          0.2588190451

What method is used? I think about Taylor approximation, is it good idea? If not, I need to compare it with Taylor approximation.

GAL := 3*sqrt(6)/((2*x^2+3)*sqrt(4*x^2+6));

simplify(GAL) and combine(GAL,power)

have same result.

How to make them return

3*sqrt(3)/(2*x^2+3)^(3/2) ?

I'm trying to set up a "while" loop involving Newton's Method without using the Newton command. I'm leaving something out since the loop values aren't changing. This is what I have so far:

Error:=1;

x:='x';

DesiredError:=1.10^-30; (this is my error tolerance)

x_(1):=1.5; (this is my initial guess)

for n from 1 to 20 while (Error>DesiredError) do

 x_(n+1)=x_(n)-(p(x_(n))/p'(x_(n))):

 evalf(%):

hey all,

does somebody know how to make a relay with hysteresis? like this :http://en.wikipedia.org/wiki/Preisach_model_of_hysteresis

you somehow have to know from which side x is comming from, memory?

i've someting in a piecewise format, but de hysteresis is not working, becaus i don't know how to detect where x is comming from (from the right or the left)

I want to write this down in the maple:

V is a vector field namely(in cartesian coordinates) V:=VectorField(<u(x,y,z),v(x,y,z),w(x,y,z)>)

Now I want to make a vector like this:

(V.Del)V

which if write into components will be:

Hi there,

I am using the bodeplot function to plot three transfer functions, and for this I need to specify each one with a different color set. I can use the color="blue", but that assigns all the transfer functions to blue. How can I differiante between them?

Impedance_plots_afte.mw

Hello,

I am very new to maple. I am trying to determine x, y, z and the intersection the following tori:

((x * cosθ _j+ y * sinθ_j -r)² + (x * sinθ_j - y * cosθ_j -r)² + z² + a² - b² )² - 4 * a² * ((x * cosθ _j+ y * sinθ_j -r)² + z²) <= 0

for j = 1,2,3.

Hi

I try to solve following equation with the "solve" command, but an error "Warning, solutions may have been lost" is appered. tell me how can I solve this problem.

tnx

solve(-2.711505682*x-7.65*ln(3-x)-3/8*x^3+8.422482772=0 , x); 

Dear Primers

I have an exponantial equation of the form below:

eq161 := 1/2*alpha^4*(-2*exp(-1+1/2*(4*alpha^2+1)^(1/2)+1/2*(-4*alpha^2+1)^(1/2))*(4*alpha^2+1)^(1/2)+2*exp(-1+1/2*(4*alpha^2+1)^(1/2)-1/2*(-4*alpha^2+1)^(1/2))*(4*alpha^2+1)^(1/2)-2*exp(-1+1/2*(4*alpha^2+1)^(1/2)-1/2*(-4*alpha^2+1)^(1/2))*(-4*alpha^2+1)^(1/2)+2*exp(-1-1/2*(-4*alpha^2+1)^(1/2)-1/2*(4*alpha^2+1)^(1/2))*(-4*alpha^2+1)^(1/2)+2*exp(-1+1/2*(-4*alpha^2+1)^(1/2)-1/2*(4*alpha^2+1)^(1/2)...

I have been trying to obtain a 3D plot of f9x,y)=(x+y)e^(-x^2-y^2) and it keeps outputting  "warning unable to find numerical values for the in the region....blah blah blah"

Here is my call sequence

> plot3d((x+y)*e^(-x^2-y^2), x = -1.7 .. 1.7, y = -1.7 .. 1.7);
Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

Anyone know what to do? ...

Can I install both 32 and 64 bit version on one PC? (64 bit in Program Files and 32 bit in Program Files (x86))?

If so, does it mean  I will need to use a second license? Not a problem, my Office version is 32 bt and have Maple 64 bit installed and I want to use Excel.

Hi

I am trying to do an animate plot of the Lorenz System, so that it appears as time progresses.

I have solved the equations numerically using rkf45 (using a code i found somewhere else, not taking credit for that! This is the code i used to solve it http://people.oregonstate.edu/~peterseb/mth480/docs/lorenz.pdf) and now i wish to plot the solution evolving over time using animate.