janhardo

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Title: B. Ed math

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Classification of conic sections...

Asked: janhardo 1007

July 09 2020

0 11

I must do some formula manipulation

Classification of conic sections

>	restart; with(student):

>	Ax^2+By^2+Cx+Dy+E=0;

(1)

>	f:= Ax^2+By^2+Cx+Dy+E;

(2)

>	completesquare(f, x);

(3)

>	f:= Ax^2+By^2+Cx+Dy+E;

(4)

>	ans:=Student[Precalculus][CompleteSquare]( (4), [y] );

(5)

>	ans1:=Student[Precalculus][CompleteSquare]( (4), [x] );

(6)

ans+ans1;

(7)

>	B(y + D/(2B))^2 + Ax^2 + Cx + 2E - D^2/(4B) + A(x + C/(2A))^2 - C^2/(4A) + By^2 + D*y = 0;

(8)

Now i must get this form A( )^2 +B( )^2 = M

Download vraag_herleiding_conic_sections_formule.mw

No gridlines options for plot3d...

Asked: janhardo 1007 Product: Maple

July 06 2020

0 4

I like to show a domain as a roster of gridlines
The plotbuilder has not this option gridlines , so i must program this ?

A general Step Function not with the r...

Asked: janhardo 1007

July 05 2020

1 12

A complicated programmed task for me
I must analyze this

In this plot there are vertical walls connected with the step area's , but that its not wanted.
Also the domain is showed by adding 0 in the plot 3d( {0, 'g(x,y)'}, ...) and this distract the plot with the step area's
Its not needed the domain in the plot ( in order to get the 0 value for z )

The 3 axis x,y,z are not visible in the plot
Seems to be not complete programmed as it just to be.

restart

>	f:=proc(A,B,T,x,y)

>	local n,m,i,j,val;

>	n:=nops(A);m:=nops(B);

>	for i from 1 to n-1 do

>	for j from 1 to m-1 do

>	if (A[i]<=x and x<A[i+1]) and

>	(B[j]<=y and y< B[j+1]) then val:=T[i,j];

end if;

end do;

val;

end proc:

>	A:=[0,1,2];B:=[0,1,2];T:=array([[1,2],[1.5,1]]);

array( 1 .. 2, 1 .. 2, [( 2, 1 ) = (1.5), ( 1, 1 ) = (1), ( 2, 2 ) = (1), ( 1, 2 ) = (2) ] )

(1)

>	g:=(x,y)->f(A,B,T,x,y);

(2)

>	plot3d({0,'g(x,y)'},x=0..2,y=0..2,axes=normal, scaling=constrained,orientation=[-37,75], projection=0.8,tickmarks=[3,0,2], shading=XYZ,lightmodel='light3');

Download texc_set_4_-task_3_-forumvraag.mw

What procedural code in Maple is public...

Asked: janhardo 1007 Product: Maple

July 04 2020

1 1

With showstat( ) i can see procedure body
But it is also possible for tools : assistant, math apps, tutors and tasks ?

In library all proc are public.

Graphing a piecewise function...

Asked: janhardo 1007 Product: Maple

July 03 2020

2 5

Should be that i was thinking on the use the arrow operator for a function definition and to use this for graphing this function
It becomes complicated.

restart;

the following piecewise-defined function was considered

exc set 4 task 1a

>	sin(3*x): # x <= 0 .. must be evaluated to true or false for branching to #other second function sin(x/3): # otherwise

>	h:=proc(x) if x<=0 then sin(3*x) else sin(x/3) fi; end proc:

>	maplemint(h);

h(1); #

(1)

h(1.0);

(2)

Strange that this function notation e.g h(1) can be used for a expression ?, while the idea was to use this only for a function defintion with a arrow operator ( function as a procedure )
Seems to be possible to use the notation e.g : h(1) or h(1.0) if the input parameter is numeric for a expression.

The condition in the if statement must be(can only) evaluated numeric..that seems to be not possible with the arrow operator definition in the procedure.

h(x);

Error, (in h) cannot determine if this expression is true or false: x <= 0