If I have a polynomial in terms of x, is it possible to extract the coefficient of x^2 easily (without copying and pasting)?

The coefficients of the polynomial are large and ugly and not worth typing out.

If there's no command for getting the coefficient, perhaps I could map my polynomial (which is, say, P=ax^3 + bx^2 + cx+d) to a vector space where x^3 = (1, 0, 0) = v1, x^2 = (0, 1, 0 ) = v2, x = (0,0,1) = v3 and P = av1 + bv2 + cv3 + d.  And then the coefficient of b would be the dot product of P with v2.  But I don't know how to do this either!

Hi

I am quite new to Maple and to these forums so please be gentle with explanations! I have a series of procedures which i would like to save as a package so that when i open a new worksheet i can type with (...) and all the little programs will be loaded. How do i do this?

When I open my file I get this message....What does it mean??? Why it appears?

 

 

 

I don't know if it's clear, but what I want is write a formula  ...And I'd like it to treat it as Text not math (I don't want Maple to execute it, of course appears an error message if so)

I looked over the FAQ's and I was not doing anything wrong according to them but I have tried graphing all of the following and got blank graphs as a result every time. I am using Maple 12 on Mac OSX Leopard 10.5.4. plot3d((2*x^2+y^2)*e^(1-x^2-y^2), x = -1 .. 1, y = -1 .. 1, axes = normal, scaling = constrained, numpoints = 10000) implicitplot3d((2*x^2+y^2)*e^(1-x^2-y^2), x = -10 .. 10, y = -10 .. 10, z = -10 .. 10, axes = normal, scaling = constrained) implicitplot3d((z = 2*x^2+y^2)*e^(1-x^2-y^2), x = -10 .. 10, y = -10 .. 10, z = -10 .. 10, axes = normal, scaling = constrained)

I need to be able to enter number line plots into MapleTA questions and answers; I have found no built-in functions to do so, and as such have created my own crude Maple function for drawing them piece by piece.  However, this function is a bit longer and uglier than I would like to see replicated in every single question that uses it, so I was hoping to have questions share this function between them, hopefully in the form of a module or library, eventually with a variety of such functions, which I can maintain in one central location.

I have a worksheet saved, but if I try to continue where I left off, Maple has forgotten what all the variables mean and what their values were. 

It's not like I have to retype everything - the commands are still there - but I have to press enter about a hundred times to reenforce what the meanings of all the variables were. 

Is there a way to save it in such a way that you don't lose such information?

This is what I ve to solve...It's simple!And it works, but if I write:

>fsolve({2*x + y = 1, x - y  = 2}, {x, y});

>y;

it writes y and to the value that solve the sistem!Did you understand?How can I do it?

 

>fsolve({2*x + y = 1, x - y  = 2}, {x, y});

I must say I am pretty dissapointed by the fact that TA4 still has a lot of very basic, obvious bugs and suboptimalities which I would have thought were clearly apparent in TA 3 and could surely have been corrected.   For example:

(1) $a=0;  $b=$a;     sets $b = -0

(2) $c=frac(-2,-1)     sets $c = --2

Hi,

I have the following (simplified here) formula:

G = ∫∫ g dp (n * dr)

The last part "(n*dr) is actually a dotproduct. How do I put this in Maple? Usually you use something like "G:=Int(Int(g dp (n), p=0..1), r=0..1) but than I don't have a dotproduct between "n" and "dr".

Tim

 

How do I build a cobweb plot of a recursion equation in Maple?

for example,if we have a table T=table([aa=2, bb=3 cc=4, dd=5]),how can we get another table(2=aa,3=bb,4=cc,5=dd) ?

another question:
if we have table([aa=3,bb=5,cc=1,dd=3]),how can we output indices according to entries' ascending order?

thank you

i would like to know any of you guys have any ideas on forecasting economy. basically using different equations and its command in Maple?

Is there a way to convert a complex expression into the form a + ib (splitting it into its Re and Im parts) , even if the expression that you want to convert is in terms of a variable?

ie, I have something like f(r) and I want to put it in the form a(r) + i b(r)

How do I set maple to work with this units kN (kilo newtons), MN (mega Newtons 1MN= 10^6 N)??'  I'm Just starting with maple. Thanks for your help!