Hi,

I'm trying to compute the mean and variance of a custom discrete random variable, as indicated in the file below (well, I do know its mean and variance, but I need the variable in a more complex context). Defining it is no problem at all, but when I parse Mean(Y) and Variance(Y), a weird expression shows up, despite my random variable being really simple. Does somebody know what goes wrong?

sol := solve(f);

sol := [3, 1+2I, 1-2I];

would like to consider 1+2I and 1-2I is the same thing

however repetition not work in this case

would like to check this in if statment and count add one when meet this condition

as there are many equations to check

i interpolate data and result in 96 equations

and then solve them and saved their roots into Vector roo, each of roo has 3 roots

and would like to animate first root of 96 equations, second root of 96 equations to see how roots move 

however meet difficulty when animate, how to animate this

moreover, is it possible to slow down the anime when playing it

> roo; Vector(4, {(1) = ` 1 .. 99 `*Vector[column], (2) = `Data Type: `*anything, (3...

Hello,

This method works in 2d... but in 3d I get a HFloat undefined output when I try and substitute the actual values in to the function. If anyone could have look through the programming and see why this is, it would be really helpful!

Thanks,

Rach:)

The_Whole_Program_I.mw

1. which command can check the result of solve command has repeated roots?

2. which command can check the result of solve command has zero roots? is it only find whether contains zero in the list? which command is to check contains zero in the result in solve

I need to solve the following equation:

>restart;
>z := a+b*y*conjugate(y) = 0;

where y*conjugate(y) is unknown. How to solve it or how to eliminate y*conjugate(y) from the equation?

Thank you.

In the "solve" expression below, I am puzzled why the Maple solution has the natural log argument

((Voh-Vthl) / (Voh-Vtlh)

rather than

((Vthl-Voh) / (Vtlh-Voh)

as I would have expected;

solve(Vthl = Voh + (Vtlh - Voh) * exp-(t / t1), t)

?

Thank you

I need to graph x^3-xy+y^3=7 and y=-11(x-2)-1 on the same graph.

http://www.maplesoft.com/support/help/Maple/view.aspx?path=VectorCalculus/Divergence 

with(VectorCalculus):

SetCoordinate(cartesian[x, y, z]);

F := VectorField(<x^2,y^2,z^2>);

Divergence(F);

Error, (in VectorCalculus:-VectorField) no coordinate names were given

Error, (in Vector) dimension parameter is required for this form of initializer

Hi, was wondering if any of you could help me, when I try and find the real part of a function to plot, I get a float(undefined) error, however by just using evalf if gives gives me the real and comlex parts.

zetaroots.mw

The function i want to find realy parts for is f(x).

Thanks,

Matt

Hey,

I know this might seem a bit trivial but I'm trying to get Maple to use iteration to get the shortest path between two points given initial conditions that aren't a straight line. (I'm learning how to do it in the simplest form before moving on to a 3D problem.)

So I have a initial set of points that are to be moved during the process and split them into their x and y components so there's a set of x[j]'s and y[j]s.Then I defined a couple of procedures to use in the iteration.

I have the following equation, I want to solve it for b keeping a and c fixed.

5*b^5+(60-5a)*b^4+(125+50c-80a)*b^3+(594c-445a-775)*b^2+(2324c-1005a-3270)*b+3000c-750a-3000=0.

How to solve it in maple?

Hello! I have the task to calculate the two angles of an 3d linkage. now in step 11 i have these two equations:

I have to solve these for phi, that is the angle I'm looking for. But the solution for phi should be indepented of psi. alpha and beta are variables. Everything else are known constant values.
What I tried: I solved Gl7 for psi (step 12...

Can someone please solve only #19 and #25 using Nwton's method in Maple. I really appreciate it.

The questions are attached. Thank you

An intersection in my neighbourhood, currently controlled by a 2-way stop, is under consideration to become a 4-way stop.  This means the traffic that currently has the right-of-way will be required to come to a complete stop, wheras previously they could have coasted down the hill, and accelerated up the other side.   Politics aside, I was curious to explore the following question: