lemelinm

1410 Reputation

13 Badges

14 years, 180 days

 

 

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Mario Lemelin
Maple 14.00 Win 7 64 bits
Maple 14.00 Ubuntu 10,04 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987

MaplePrimes Activity


These are answers submitted by lemelinm

I try the solution for this one:

 

>simplify(int(1/T, T = 273*Unit(K) .. 353*Unit(K)));

 

It is not working.  Even if I add «assuming T>0» in Math 2-D.

 

Since I have already define T1:=273[[K]] and T2:=353[[K]], the only way that it will work is if I write it this way:

Then it is Bingo!  But I found it sad because it is not pretty.

 

Any suggestion?

 

 

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Mario Lemelin
Maple 18 Ubuntu 13.10 - 64 bits
Maple 18 Win 7 - 64 bits messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987

This should help you visually.

 

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Mario Lemelin
Maple 17.01 Win 7 -  64 bits
Maple 17.01 Ubuntu 12.04 LTS - 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987

Can you provide a link to the article that inform you about this acquisition?

 

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Mario Lemelin
Maple 14.01 Win 7 -  64 bits
Maple 14.01 Ubuntu 10,10 - 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

In the help browser, you cannot search a topic with two or more words.  You can do a text search but the quantity of results are too big to be helpfull, even if you choose Resources: Help pages only.  But if you search for topic the word date, you will find in the result :

StringTools[FormatTime] - return a string containing a formatted date or time

So you are not missing something.  I think that Maplesoft should do some work on this aspect of Maple.

 

--------------------------------------
Mario Lemelin
Maple 14.01 Win 7 -  64 bits
Maple 14.01 Ubuntu 10,10 - 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

In Document mode:


> sol := solve({x-y = b, x+y = a}, {x, y});

                   /    1     1          1     1  \
           sol := { x = - b + - a, y = - - b + - a }
                   \    2     2          2     2  /

> assign(sol[1]);

> x;

                           1     1  
                           - b + - a
                           2     2  
> assign(sol[2]);
> y;

                            1     1  
                          - - b + - a
                            2     2  
> x/y;

                           1     1   
                           - b + - a
                           2     2   
                          -----------
                            1     1  
                          - - b + - a
                            2     2  

 

 

--------------------------------------
Mario Lemelin
Maple 14.01 Win 7 64 bits
Maple 14.01 Ubuntu 10,04 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987
> map(proc(n) coeff(z, x[n]) end proc, [$1 .. 6]);

                     [7, 0, 11, -10, 0, 26]


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Mario Lemelin
Maple 14.01 Win 7 64 bits
Maple 14.01 Ubuntu 10,04 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987

... that the problem is the fact that the second argument must be a name, function or a list (set) of names.  But x^2 is of type `^`.   After looking at your problem, my first solution would be this:

> with(Student[Precalculus]);

> f1 := x^4+2*x^2;

                               4      2
                        f1 := x  + 2 x
> algsubs(x^2 = s, f1);

                             2      
                            s  + 2 s
> CompleteSquare(%, s);

                                 2    
                          (s + 1)  - 1
> algsubs(s = x^2, %);

                                 2    
                         / 2    \     
                         \x  + 1/  - 1

--------------------------------------
Mario Lemelin
Maple 14.01 Win 7 64 bits
Maple 14.01 Ubuntu 10,04 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987
> alias(d*f(x)/dx = diff(f(x), x))

                             d f(x)
                             ------
                               dx  
> f := x -> x^2

                                     2
                          f := x -> x
> d*f(x)/dx;

                              2 x

 

--------------------------------------
Mario Lemelin
Maple 14.01 Win 7 64 bits
Maple 14.01 Ubuntu 10,04 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987

 There is no "easy to use" Maple Reader like Mathematica have for reading nothebook (*.nb) or like Adobe for reading PDF file (*.pdf).  If you want to show a worksheet on a computer that doesn't have Maple installed, I would suggest to you to use the "Export As" in the file menu and save the worksheet in the PDF format.  You will be able to show the PDF file but, of course, you won't be able to re-execute or modify the worksheet.  If I am not mistaken, this option is offered in Maple 13 and 14.  Could someone confirm this?

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Mario Lemelin
Maple 14.00 Win 7 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987
> with(plots);
>inequal({x-1 < 0, y = 0}, x = -3 .. 3, y = 0 .. 3, 
optionsexcluded = (color = blue, thickness = 2));

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Mario Lemelin
Maple 14.00 Win 7 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987
> f := x -> exp(x);

                        f := x -> exp(x)
> approx5f :=(g::procedure, a::integer) -> g(a)+(D[1](g))(a)*(x-a)+(D[1, 1](g))(a)*(x-a)^2;

        approx5f := (g::procedure, a::integer) -> g(a)

                                                       2
           + D[1](g)(a) (x - a) + D[1, 1](g)(a) (x - a) 
> approx5f(f, 2);

                                                   2
           exp(2) + exp(2) (x - 2) + exp(2) (x - 2) 
 

 

 

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Mario Lemelin
Maple 13.02 Win 7 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 It work.

> 0.1e123456789877+0.1e123456789877;

                            123456789876
                        2 10            


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Mario Lemelin
Maple 13.02 Win 7 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 same problem.  But I have been told that it has been corrected in the next release of Maple.

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Mario Lemelin
Maple 13.02 Win 7 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 First, watch the difference between f and g:

 

> f := x*y*sin(x-y)/(1+x^2+y^2);
                           x y sin(x - y)
                      f := --------------
                                 2    2  
                            1 + x  + y   

> plot3d(f, x = -2 .. 2, y = -2) .. 2);

> eval(f, [x = 2, y = 3]);

                             3       
                           - - sin(1)
                             7       
> g :=(x,y)->x*y*sin(x-y)/(1+x^2+y^2);

                                x y sin(x - y)
                 g := (x, y) -> --------------
                                      2    2  
                                 1 + x  + y   
> plot3d(g(x, y), x =-2 .. 2, y = -2.. 2);

> g(2, 3);

                             3       
                           - - sin(1)
                             7       
> with(VectorCalculus);
> SetCoordinates(cartesian[x, y, z]);

                       cartesian[x, y, z]
> TangentPlane(f, x = 2, y = 3);


That should give you a start.

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Mario Lemelin
Maple 13.02 Win 7 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

 the fact that if you read carefully, when you click on the context menu for "Numeric Formatting..", there is the "Minimum Exponent Digits" that is set to 1.  So if you tried:

>1.3e0

and change to Scientific, you will have 1.3 but, if you do

>0.13e1

and chose Scientific, it will work like you asked.  Hope it will help you.  If not, don't hesitate.

--------------------------------------
Mario Lemelin
Maple 13.02 Win 7 64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987
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