How can I apply the function sin(x) to a list of numbers [4,6,Pi]? Thanks in advance!

Hey folks and (almost) Merry Christmas!

How do I check if a number is a permutation of another number (doesn't have to be a cyclic one though)

E.g...

Let x = 123456789

How would I test to see that, for example, 847591236 is a permutation of x without generating every permutation of x?

I feel there should be an obvious command for this but I can't seem to find any...

I'd like to add the summation with just the index below, not the i=1..n form, but Help seems to say that I can only expressions and entities from other palettes...

I found a minor error in Help...

Hello,

it's my first utilisation of MAPLE, and I want to determine the max of a function y(x). I have this differentiel equation with 2 variables :

a*diff(y(x),x,x) + b*(diff(y(x),x)-diff(z(x),x)) + c*diff(y(x),x) + d*y(x) + e*(y(x)-z(x))= 0;

I resolve it whith the function "dsolve", and now and I want to calculat the max of the function y(x).

can any body help me ??!!!

thanks

The original function is 6x^2+5x-4/2x^2-7x-4. The equation of the line which is tangent to the curve at the point (0,1) is -12/35x - 1/35. Is this correct? I used the command Tangent(f(x),x=-3). The equation of the line which is normal to the curve at the point (-3,1). is 35/12 + 39/4 . Is this correct?

I thought that I'd help out another poster, so I clicked on the .mw link and got (r-click as usual) a download of an aspx link, or (clicking the link) a blank web page.

I'm trying to reproduce the following graph:

http://upload.wikimedia.org/wikipedia/commons/thumb/2/22/HarmonicNumbers.svg/600px-HarmonicNumbers.svg.png

I have got this far:

N:=10:
theHarmonicNumbersPlot := plot([seq([n,sum(1/i,i=1..n-1)-gamma],n=2..N)],style=point, colour=red):
theHarmonicFunctionPlot := plot(Psi(n), n=2..N, colour=black):
plots:-display([theHarmonicFunctionPlot,theHarmonicNumbersPlot]);

But my plot is missing the horizontal...

g(theta) := array([[cos(theta), -sin(theta)],[sin(theta), cos(theta)]]);
dg := map(diff, g(theta), theta);
invg := inverse(g(theta));
w := multiply(invg, dg);
w := map(simplify, w);

crossprod(-w, w); <- have error?

How to cross product between matrix?

As i know wedge product is cross product, so i use cross product

I am trying to plot a function and its horizontal and vertical asyptotes into one graph. I have been trying but unable to get the results I need. I am getting too many Maple errors. What is the correct way to do this? The function is : 6x^2+5x-4/2x^2-7x-4. The asymptotes are y=3,x=-1/2,x=4.asymptote_and_functi.mw

Hi,

I would like to plot three dimention using plot3d,

How to make label using plot3d. If i assume the label is [a,b,d] how to insert in plot label

could you please help me with provide Example.

when i type in the command plot3d(sin(x*y),x=-Pi..Pi,y=-x..x) maple keeps returning error. why is that so?

I've looked at a number of plot options, and don't see how to get the same relative size in my printed doc that I see on the screen...the plot size wrt the text and formulas. Is this related to the same problem that I have getting images in general to be a predictable size?

I have a document that prints a square over one of the letters in a string when I export as PDF. This does not happen when I print to CutePDF...I suspect some sort of "hidden" character in the file, but don't know how to access it...

I don't seem to be able to get Help to respond to searches with more than one keyword...for example, I entered "date format" and received "No Matches Found."