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Suppose I have a system of three coupled equations as:

eqn[1] := a*x+b*x^2+c*x^3

eqn[2] := a1*x+b*x^3

eqn[3] := a2*x^2+b2*x^3 = a*x^2

If I simply write

eqs :=( eqn[1], eqn[2], eqn[3])

the equations get coupled.

1. Can I do it using loop structure?

2. Secondly, after coupling suppose I want to collect coefficoent of x, x^2 and x^3 from three equations ang get the equation in form

eq[0]:=a=0,a1=0

Hello,

i am currently trying to get some equation of motions. For this i have to invert a matrix which looks like this:

A = GL * M * GL.'     (6x6)

M is the massmatrix. GL is a matrix with kinematic constraints because i am working on a closed loop subject. The problem is that GL consists of symbolic trigonometric terms which i can't replace with numbers. Because of the multiplication with the transpose and the massmatrix the elements...

I put Celsius in my equation and I get the wrong answer even though I've loaded the Units Package:

Download 25-25not_work.mw

I have to put in the conversion to Kelvin by myself to get the right answer:

Download 25-25_works.mw 

What am I doing wrong?

Thanks ahead of time!

Edo

Hello all-

I have a system of equations, something like:

X1+X2+X3=1

and then I have seperate equations such as:

X3=T*X1^2*exp(.12/T) and so on

I'd like to make a plot of X1,X2,X3 as a function of T.  How can I do this?

Thank you for your time!

Hi,

I am trying to simplify the expression s as given below. (I am not sure why it comes up with all the vector caclulus notation in it but it should display okay when you enter it)

Because of the presence of the exponential imaginary fucntions I thought evalc might be useful but when I use it I get a huge expression with csgn appearing in it. To my knowledge csgn appears when assumptions are not correctly specified - is this so? I can't see any assumption...

I am getting bcak into MAPLE after being away for a while, so this might be a trivial question, but...

I am using plots[pointplot] to plot a series of points.  The default min and max values on the x and y axes of the plot are the corresponding min and max values of the x(first) coordinates and y(second) coordinates of the points.  I can change this by left-clicking on the plot and adjusting the axes properties, but I am wondering if it would be possible...

Ive tried this for hours and can't get it to work. Any help would be greatly appreciated. I need to 

find a 10 significant figure approximation to the 10^th derivative of

evaluated at x = -2.

Ive tried using this maple command:

evalf(subs(x=-2,diff((sin((x^2...

the derivative of the improper integral int(cos(1/sqrt(u))^2,u=0..x) at the point x=0 with Maple?

Dear Sir / Madam,
Could you recommend me how to find the square root of the complex equation correctly?
My equation looks like this
sqrt(complex_equation_1^2 + complex_equation_2^2).

Regards,

I have a very large equation which has an arctan(x,y). I need to be able to extract the arguments x,y and assign them in some variables.

I have tried the solution given here.

Unfortunately, that solution only works for constants, not equations.

For example, if I use the proc given in there with arctan(10,11) it works. But if I use something like arctan...

Hello,

I am trying to import some data into Maple from an Excel sheet that contains three columns.

Column 1 is simply an index number for the measurement running from 1 to 3185.

Column 2 is the time of the measurement ( e.g 10:23:44 ) with Excel formatting as "time".

Column 3 is the measured CO2 concentration logged at the psecific time.

My problem is that when I import the data into Maple using the ExcelTools,Import or simply the Import...

Suppose N numbered cars start a race with starting positions N < ... < 4 < 3 < 2 < 1, car number 1 starting in front. (the car's index is the position on the starting grid) The race covers a total of L laps.

If two successive cars are in the position i < j, the probability that i overtakes j within 1 lap is P(i,j). This probability is independent of the position on the track and is constant throughout the race. For instance, if the starting positions...