## Question chaining for inline / multipart questions...

Hello, I want to be able to use the student's answer from one question in the evaluation of the correct answer for the next question. I have found code online for question chaining between separate questions. Unfortunately I can't seem to be able to do this for either inline or multi-part questions. Is this possible?? Help would be appreciated. Thanks, Ray Cohen PS See the attachment for the question bank containing our attempted code. Download 5165_Question_Chaining_Example.txt

## Font...

How do I change the font permanently so that every time I open a new worksheet I get, say, Arial instead of Times New Roman? Thanks!

## Identifying identical rows in a matrix...

I have a problem where I am performing some matrix operations and the resulting matrix is of rank n-1, where n is the order of the matrix. I want to solve M*x=x, where M is the resulting matrix. Since teh order of M is n-1, I keep getting zero values for all but two of the variables. What is the best way to get around this problem? I am a Maple novice. Please let me know how to do it in Maple. Thanks.

## Comparing different versions of the same worksheet...

During the evolution of my code I have ended up with numerous versions of similar files, each with minute differences to the next. Is there a way to compare these worksheets?

## Question bank intolerably slow! (Maple TA v2.5)...

Hi, I have been developing some advanced questions for a computational mechanics subject. Unfortunately these questions are running _much_ slower than the sample questions supplied with Maple T.A. It has been difficult enough to get these questions to actually work, only to find that they are intolerably slow. We suspect that it may have something to do with the use of the command maple("printf(MathML:-ExportPresentation(\$f))"); throughout the questions. Can someone please offer some advice on how to fix the questions up? Thanks, Ray Cohen The University of Melbourne PS The question bank may be found by following the link below:

## Matrix problem...

I have the following matrix problem that I am having trouble with. I have the following equation. A-1 * C * D * A * v = v A, C and D are of the same order. A & D are diagonal matrices. D is a diagonal matrix with values that are the row sums of matrix C. I get answers that are reasonable in some instances and zeros in others. I have uploaded a Maple file with what I am doing with some data. Would appreciate help. Thanks. Brian Download 2031_Matrix problem.mws

## Latex...

Simple-simple......How do I get the LaTeX code for an input equation? If I type in the derivative of x squared, right click and select Conversions>LaTeX I get the LaTeX code for the output, i.e. for 2x, not for the derivative of x squared. Thanks!

## PDSolve, Error: duplicated elements (ranking)...

Hello! I have some trouble with getting an explicit solution to a PDE: f=f(u,v) in IC^4 (IC=complex numbers) So i have a system of 8 equations, first order, integrable (i.e. solution exists by theory). I'm getting the following, when calling pdsolve(PDE, fcns), where PDE is the set of the PDEs and fcns are the 4 complex functions f[i], i=1,2,3,4: "Error, (in pdsolve/sys) duplicated elements (ranking)" What could it be? Thx, yadaddy.

## Continuum Mechanics, Indicial Notation Question...

I am using the new Physics package for Maple 11 to do indicial calculations for a continuum mechanics problem. I need two sets of coordinates for Lagrangian and Eulerian frames. In Maple, I have defined two sets coordinate (X and Y) each with dimension equal to three. Summation is not performed over the time variable, which is treated differently. If, X is a point in Eulerian frame, it is related to the Lagrangian frame (Y) by: X=X(Y,t) How could I calculate "X[k],K" ? Where the smaller index is in Eulerian coordinates (X), the capital index is in Lagrangian coordinates (Y) and "comma K" (,K) denotes the derivative of X[k] with respect to Y[K]. Could someone show me its implementation using the d_ command.

## Permutations...

Hi, I was wondering if anyone knew how to make MAPLE (10 that is) to diplay all the permutations of a certain number, say 1100 with each digit in a position in a vector. I can only work out how to make MAPLE work out the permutaions- and nopw how to put it into a vector. Also, the permutaions recognise the two ones and zeros as different numbers, when I don't want that. So for the example 1100, I would want MAPLE to output (1,1,0,0) (1,0,1,0) (1,0,0,1) (0,1,1,0) (0,1,0,1) (0,0,1,1) Can anybody help me with this? Thanks, Steph

## Plot regions with procedure...

Hello, Could anybody please tell me how to plot regions using a procedure in maple. Specifically I have a procedure f of two variables that can output an integer between 1 and n. I want a 2 dimensional plot that gives a different color for each value of this procedure. Any help is much appreciated -- thanks. PS: As an example I tried this: > g := proc (x, y) if x <> plot3d(1, x = 0 .. 2, y = 0 .. 2, color = g(x, y)); But this results in the following error: Error, (in g) cannot determine if this expression is true or false x

## nth Term problems......

Does Maple have any functions that would help to work out nth Term series problems where I'm giving a series of fractions and I need to determine what the nth Term is before I can start working the problems? Thanks,