Hello,

I have this relatively simple 4 equations which I am trying to solve simultaneously. But for some reason Maple just returns a pair of empty square brackets as solutions. "[ ]" like this.

I have uploaded the Maple Worksheet for your convenience. It would be very helpful if anyone can take a look at it and point out out the problem. Thank you.

Simultaneous_Eq.mw

Hi, im Gabriel from chile, and probably my english wouldnt be very good :P.

Im working on a problem that needs to be solved numerically, its a set of coupled non linear equations. Im succefull in finding the solution given a set of initial conditions, but the problem I have is when I try to save those solutions.

I want to save them in a .m file to fully recover it when I start the session again (it take some time in find the solution, and I have to iterate the...

Hello, I need to know how to graph in Maple as follows:

the plane 2x + 3y - z = 5 and the cylinder x ^ 2 + 4y ^ 2 = 9 x ^ 2 + y ^ 2 = 1.

The idea is to plot everything in a single graph, as shown in the books of calculation.

I have tried in various ways, but I do not go away.

I've been trying to evaluate another integral, like exp(-(alpha*x)^2) from 0, to infinity;

However it expresses the answer as a limit of some function(alpha), how do I get the integral to come out more exactly?

Thanks

Hello,
I have to find the internal of
E_field := conjugate((-.7147663039-.8729430992*I)*exp((9.123185068*I)*cos(phi))*cos(phi)+(0.3187576278e-1+0.3371906130e-1*I)*sin(phi)*exp((4.561592534*I)*(-1.*sin(phi)+cos(phi)))+(0.7062621752e-1+.1302618973*I)*cos(phi)*exp((2.000000000*10^(-11)*I)*(53.*cos(phi)+1.570796328*10^11))+(-0.3187599160e-1-0.3371906130e-1*I)*sin(phi)*exp((4.561592534*I)*(sin(phi)+cos(phi))))*sin(phi):

I try to solve by
evalf(simpson(E_field, phi = 0..2*Pi));

I was trying to evaluate a 2-dimensional integral, but my answer contained an expression like pi/pi^2;  even trying to simplify this did not reduce the fraction properly. Why does this happen, and how can I get it to display the answer properly?

Thanks

I got two columns of data in excel: current (I) and voltage (V). What i want to do the following things:

1. read the data set into Maple 12.

2. plot the current vs voltage

3. Fit the plot to the function with polynomial form:  I=aV^2+bV

4. find the R-squared value of the fitted function.

Could anyone kindly tell me the detailed code to achieve this, thanks a million.

restart:
with(student):
with(linalg):
# system of linear equations
A := array(evalf([[2, -1, sqrt(2)], [3, 2, -3], [3, sqrt(2), -15/7]])):
B := array(evalf([5 + 7*sqrt(2), -24, -12 - 3*sqrt(2)])):
B := `<,>`(B):
print(A):
print(B):
N := 3:
t := 1*10^(-6):

for j from 1 to N do
for k from j to N do
S := 0:
for i from 1 to N do
S := S + A[i,j]*A[i,k]:
end do: # end of i
C[k] := S:
end do: # end of k
C := 0:

Given Datas:

xd := Vector([0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 500, 750, 1000, 1250, 1500, 1750, 2000, 2500, 3600])

yd1 := Vector([0, 6.24, 11.26, 14.9, 17.58, 20.01, 22.0, 23.56, 24.85, 26.03, 27.36, 35.07, 39.4, 42.61, 44.36, 45.79, 46.62, 46.9, 47.79, 48.85])

Given function: (looks a little different in Maple, but copy and paste did not work)

<maple>F2 := proc (x) options operator, arrow; K2*(1-(T12-Tv2)*exp(-x/T12)/(T12-T22...

Hello.

I have a problem with creating eigenvalues of a 14x14 matrix.

when i execute "LinearAlgebra[Eigenvalues](A)" there are only results like "-3.2211+29.1111I"

The problem is the 'I' at the end. I need numeric values for plotting or stuff like that.

Wheres my mistake? I have no clue.

Im looking forward to any suggestions! At the bottom...

Hi!

I have a serious problem and im looking forward to any suggestions.

Like i already wrote i wanna create a simple matrix (14x14) out of four matrices(7x7) and i have no clue how to accomplish this task in maple.

to be more specific, i want to create matrix M=(A,B,C,D) each of them is another 7x7 which results in a 14x14 matrix.

I guess its a simple task but i tried hard and didnt get it worked.

thank you  in anticipation