Hello everybody,

Consider I have a plane equation: x^2+y^2 + z^2=8

Or every formula of hyperboloid, or another similar equation.

I want you to explain me how to convert from plugged form to the interpreted form and to parametric form such equations.

Please show me an example, as you know every plane equation can be parametric, interpreted and plugged.

Hope you understand what do I mean, 3 types of presentations of the plane equation.

Please explain me why it happens:

with(LinearAlgebra);

MatrixInverse(`<|>`(`<,>`(a, c), `<,>`(b, d)));

Error, MatrixInverse is not a command in the LinearAlgebra package

WHY? Whats wrong, please explain me?

Hello,

I have 3 points:

A:=<a,b,c>;

B:=<e,f,g>;

C:=<h,i,j>;

Please show me what is wrong: plane(p1,[A,B,C],[x,y,z])

how to make a plane with these points.

error: Error, (in geom3d:-Equation) wrong type of argument

Thanks a lot!

Please help me understand why this error occurs:

PlanesTetrahedron := proc (A, B, C, D)

local plane1 := 0; plane2 := 0; plane3 := 0; plane4 := 0; Plane1 := 0; Plane2 := 0; Plane3 := 0; Plane4 := 0; M := 0; CutPoint1 := 0; CutPoint2 := 0; CutPoint3 := 0; CutPoint4 := 0; V := 0; Temp1 := 0; Temp2 := 0; Temp3 := 0; Temp4 := 0; S1 := 0; S2 := 0; S3 := 0; S4 := 0; temp := 0;

plane1 := Equation(A, [x, y, z]);

plane2 := Equation(B, [x, y, z]);

Hello 

Here are the commands, I can't understand why this error comes out

http://i1.ambrybox.com/070710/1278460271555.JPG

It comes out when I want to do this: display(Lines,A)

P:=<1,2,3>

P1:=<-1,-1,0>

P2:=<-1,-1,0>

P3:=<0,-1,-1>

Plane:=x+2*y+3*z

L1:=P+t*(P1-P)

L2:=P+t*(P2-P)

L3:=P+t*(P3-P)

Lines:=spacecurve([L1,L2,L3],t=-2..2)

A:=implicitplot3d(Plane=0,x=-2..2,y=-2..2,z=-2..2)...