Hi, 

I have the following six equations that I need to solve:

eq1 := A^5*f6+A^4*f5+A^3*f4+A^2*f3+A*f2+f1 = ln(V1);
print(??); # input placeholder
eq2 := B^5*f6+B^4*f5+B^3*f4+B^2*f3+B*f2+f1 = ln(V2);

eq3 := 5*A^4*f6+4*A^3*f5+3*A^2*f4+2*A*f3+f2 = F1/V1;
eq4 := 5*B^4*f6+4*B^3*f5+3*B^2*f4+2*B*f3+f2 = F2/V2;
eq5 := 20*A^3*f6+12*A^2*f5+6*A*f4+2*f3 = G1/V1-[F1/V1]^2;
eq6 := 20*B^3*f6+12*B^2*f5+6*B*f4+2*f3 = G2/V2-[F2/V2]^2;

 where V1, V2, F1 & F2 have previously been found/defined in the worksheet (document).

When I use the solve command, more often than not I get the expression for the numerical calculation for each variable f1-f6, rather than an actual value:

solutionset := solve({eq1, eq2, eq3, eq4, eq5, eq6}, {f1, f2, f3, f4, f5, f6})

{f1 = 0.4096495220755576e-2*[-1.328181534188746]^2-0.3072371415566682e-1*[-9.408269235937702]^2+12.64287210303000, f2 = .3686845698680018*[-9.408269235937702]^2-49.98313436120349-0.6690942193900774e-1*[-1.328181534188746]^2, f3 = -1.423532089212563*[-9.408269235937702]^2+150.6490386090756+.3909877105143377*[-1.328181534188746]^2, f4 = -.9490213928083751*[-1.328181534188746]^2+1.954938552571689*[-9.408269235937702]^2-190.3706247009334, f5 = .8192990441511152*[-1.328181534188746]^2-1.115157032316796*[-9.408269235937702]^2+103.8844069311055, f6 = .2275830678197542*[-9.408269235937702]^2-20.57204700597870-.2275830678197542*[-1.328181534188746]^2}

Why is Maple not giving me the actual value for the variables, and how do I get it to do so, everytime? [In fact it did output the actual values once – but I have no idea what I did differently: it seems to be very random….]

i.e. how do I output the following:

solutionset := {f1 = 9.930572749191651, f2 = -17.46685689954139, f3 = 25.33406943774393, f4 = -19.00233912206421, f5 = 6.620988906086421, f6 = -.8288827301180226}

thanks

hi

is there any way that i run my maplet output in  systems that havnt any maple install on them?

(i wanna run maple program without maple)

Reza²⁹⁶¹

Bonjour,

Comment se calcule avec maple le développement de laurent d'une fonction de deux variables ?

Maple n'autorise pas la commande laurent(1/x/y, [x=0,y=0]).

Merci d'avance.

Gérard.

Does N variables caylay table have N permutation group so that can generate N functions?

for exmaple 3 variables cayley table have 3 permutation group, for 1, it has a permutation group , for 2 has a permutation group etc.

then does it mean that it has 3 functions, do it need to composite 3 functions in order to get a function belong to this cayley table?

1 1 1

1 2 2

1 2 3

Compute integral In(X)/(X-A)(X-1)    0<x<∞ for positive a.

                         ∞

Compute the sum∑(k^2+k-1)/(k+2)! 

                        k=1

How to plot the function f := x->sum(sin(x/(k+1))/k, k = 1 .. infinity) on the interval 0..50? The series obviously converges.

Is there a way of extracting the terms of an expression with a certain dependence?

For example:

If I have,

expression:=f(x)+g(y)+x^2+y^3+65

I need to have,

f(x)+x^2
g(y)+y^3
65

parts separately.

(Of course, a way other than taking derivative.)

How would I find the polar representation of, say, (x^2+y^2)^2=x^2-y^2 using maple? Thanks. 

Hi! PLEASE HELP ME.. I try to give a new name in my proc where it stops at the initial condition, ic. Somehow it gave me an output like

>Orbit:=proc(Map,ic,Nit)
local orbit,z,t:
orbit:=array(0..Nit);
z:=ic:
orbit[0]:=z;
for t to Nit (while z<>ic) ot t=1 do
orbit[t]:=z;
z:=Map(z):
orbit[t]:=z:od;
return[seq(orbit[t],t=0..Nit)];
end;

>Orbit (F,[1,0],20);
##

##I want to eliminate the orbit13 and so on. I tried to give a new name where for example per:=array(0..t). I want it stops at t and do not go until Nit. Can you help me?

Hello, everyone!

Last day I’ve discovered a strange behavior of the “optimization” tool:

Mostly it copes with the task – but there are cases (the data are the same) when the tool doesn’t return the opt. value: instead it returns the parameter name.
BUT if some of the previous calculations are re-evaluated (and the same input values are received) the “optimization” tools works quite well.

The question is: how to tackle the problem?

P.S. The way to force re-evaluation of previous functions in the body of this procedure (if the optimization failed) doesn’t help: it returns the optimizing parameter name once more.

Windows 8 (64-bit)
Maple 17.00

I have  

a(t):= (0.4292960410)*(t^3+20.0*t^2+105.0*t+138.0)^5/((t+1.881246817-0.5978370144*I)*(t+2.472494183-0.1946676251*I)*(t+5.550661347)*(t+5.496908401)*(t+12.46933729)*(t+12.44618893-0.9642646277e-2*I)*(t+0.5725282710)*(t+5.589440415)*(t+12.49222265)*(t+12.44618893)*(t+12.46933729)*(t+5.496908401)*(t+5.550661347)*(t+2.472494183+0.1946676251*I)*(t+1.881246817+0.5978370144*I))

b(t)=(1.8*t^2+34.1*t+138.)/(t^3+20.*t^2+105.*t+138.)

and 

F(t):={0.5738910678*a(t)*[1-b(t)]}/t*0.5137681159

I have expanded F(t) in series form using taylor series expansion formula in terms of t.

My question is 

                           Can it be expanded in series form in terms of b(t).

Hello,

I have 2 questions about the resolution of a ODE for the simple pendulum equations.

1) I need to add 'maxfun'=10^7 in the dsolve function. With this option, dsolve works. Can you explain me in a very simple way the principle of this option ? It's just to feel better how this option runs.

2) gamma(t) is a angular parameter.

With

tgammax:=odeplot(sol,[gamma(t),x(t)],0..10,numpoints=200,color=blue,legend="z"):
display(tgammax);

I manage to plot x(gamma) but with gamma in rad.

How can i do to x(gamma) but with gamma in degree? I should do gamma_deg=360/(2*Pi)*gamma(t) but as gamma(t) is defined numerically, this lign doesn't work.

Thank you for helpe

Here some ligns of my code :

Cinit:=D(psi)(0)=0,psi(0)=-0.93,D(x)(0)=0,x(0)=1.13,D(gamma)(0)=0,gamma(0)=0.79;sol:=dsolve({sys,Cinit},numeric,'maxfun'=10^7);
tx:=odeplot(sol,[t,x(t)],0..10,numpoints=200,color=blue,legend="x"):
display(tx); 

tgamma:=odeplot(sol,[t,gamma(t)],0..10,numpoints=200,color=blue,legend="gamma"):
display(tgamma);

tgammax:=odeplot(sol,[gamma(t),x(t)],0..10,numpoints=200,color=blue,legend="z"):
display(tgammax);

I am on windows 7, 64 bit, using Maple 17.02. When opening the command line Maple, and typing:

But on the GUI, it works:

?index,packages;

and I get a new window open with the list of package.
In the command line, it works if I use ?index,package;  i.e. without the extra `s` at the end.

On a side question, I was looking at a Maple book, where it said to use ?index[packages];  but this no longer works, even in the GUI, and had to use ?index,packages;  syntax. I wonder when this change happens. The book is old, using Maple 7.

Hi, I am trying to plot these two curves:

I tried:

with(plots);  A := Array(1..2)  A[1] :=plot (0.199563349672261+0.0178636902277546 x^1.14406289706794-0.0182070811144750 x^(1.13867380551454),x=50..2050,  color=red);  A[2]  := plot(0.298910542599302+0.0117459591500434 x^1.00390277106937-0.0137065176395662 x^0.970667551759677, x = 50..2050, color = blue);  display (A);

and I got:

Error, (in plot) unexpected option: .298910542599302+0.117459591500434e-1*x^1.00390277106937-0.137065176395662e-1*x^.970667551759677

so I tried

so I am not sure how I would graph these two functions...

I am coming back to maple after being years out of it (Maple 9). I am writing a paper in class of how to use Maple with Algebra. I would like to create a document so that students can manipulate the graph of  and se how parameters a, h and k effect the function.  However, I can't seem to figure out how to create a slider linked with each parameter so students can manipulate it. 

Is this possible? Any help wold be great!

Nicholas