Hi

I want to solve this

2010.pdf 

I have a family of functions characterized by

f:=x^2+b*x+b*3;

I plotted some of them:

graph1:=x->subs(b=0,f):
graph2:=x->subs(b=2,f):
graph3:=x->subs(b=4,f):
plot([graph1(x),graph2(x),graph3(x)],x=-10..3,y=-5..15);

And now I want to draw a line through all maxima into the same diagram. The maxima have the coordinates (-1/2*b | -1/4*b^2+3*b). I managed to create a pointplot:

I need to calculate the following conditional expectation

with the marginal density

and

being the density function of a normal N(mu, sigma) distributed random variable

I tried to solve this problem. 

It is a Maple TA question, but I get my solution wrong.

***********************

Question:

There is given a linear equation system consisting of two equations with four unknowns.

I want to differentiate the following (example) sum with respect to each variable.

foo:=sum(x[i]^2,i=1..3);

By hand I solved it like that:

g1:=diff(foo,x[1])=0;
g2:=diff(foo,x[2])=0;
g3:=diff(foo,x[3])=0;
solve({g1,g2,g3}, [x[1], x[2], x[3]]);

This works for i=1..3 but later I want to have it approach infinity. I don't have that much time to do it by hand -- what's a cleaner solution?

I would like to express a matrix in a neat(er) form.  For example, both matrices;

Matrix([[1/4, 1/2], [1/2, 1/4]]);

(1/2)*Matrix([[1/2, 1],[1, 1/2]]);

return the same thing.  I would like maple to print the latter with the factor 1/2 preceding the matrix for better clarity.  Is there a simple command that will do this?

Cheers in advance.

Rob

Are there a way to this in calculate this in Maple?

I have a system of linear equations, with two equations:

x[1]+x[2]+2*x[3] = -5

x[1]+x[2]-2*x[3] = 3

a) Find one solution to this nonhomogeneous equationsystem? The answer need to be in vector form.

b) Find the "complete" solution to the homogeneous equationsystem? The answer need to be in para mite based vector form.

How do I find find an invertible matrix P and the diagonal matrix D such that A=PDP. Are there a Maple command that can do that. I need it to an Maple T.A. exam.

A= 

(−3 0 6)
(0 -3 −6)
(0 0 3) 

Hi, everyone,

I am dealing with a simplified model of my real problem. Here is the function definition

f:=(x,lambda)->min(x lambda,0)

I can plot this function in plot3d:

plot3d(f(x,lambda),x=-2..2,lambda=-2..2, axes=boxed)

but if I try to plot the derivitive of this function w.r.t. lambda (which is a discontinuous function) by:

plot3d(diff(f(x,lambda),lambda),x=-2..2,lambda=-2..2, axes=boxed)

I get error message: Error, (in PiecewiseTools:-Convert...

Maple seems to constrain pie charts to having only a name, or only a percentage or frequency. I want it all.  I don't want to choose between labels and numbers.

A pie chart like this one would be a good start: http://www.mmsonline.com/cdn/cms/Sandvik-pie-chart.jpg except I want to present frequency as well.

Notice in the example above that the large...

Hi friends,
here is a paper from a book, which partiell diff equation I would like to solve with MathCAD or Mathematica or Maple. WHo can help? Thanks  a lot spending your time.  here is the PDF File with the paper

 Hi
first : My English not good,so excuse me.
I have a problem with this:


1)C+Z*(C)*X=D where;

I know D , Z and X are matrix(n*n),(known)
but i can`t find C or Solve (1)finding C(matrix(n*n))

Help Me

Reza

The label for the horizontal axis refuses to be printed no mater what I tried. I can insert, change and manipulate the vertical axis label but not the horizontal. I don't know what else to try.

Hello

Very broad query, but I was wondering if anyone has experience of converting Mathcad code to Maple (v13)? I have a series of files that I am looking to re-code in Maple but am having some issues with equivalent syntax etc. The code varies from simple work to more complex studies with variants of FFT (including complex values).

Any help would be most welcome.

Regards

Lester

y =

I cannot solve this for i. When I use maple I get a big result with a RootOf function that I don't know how to handle. I've looked around and I cannot find anything that will help me.

Can someone please show me how to solve this?

Thanks!