Parametric Equations for Line of Intersection of 3x-6y-2z=15 & 2x+y-2z=5

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In summary, to find parametric equations for the line of intersection between the planes 3x − 6y − 2z = 15 and 2x + y − 2z = 5, we can use the cross product of the normal vectors of the two planes and set one variable to 0. This results in the following parametric equations: x = 3 + 14t, y = -1 + 2t, z = 15t. It is important to check these equations by substituting them back into the original plane equations to ensure they are correct.
  • #1
helpm3pl3ase
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Homework Statement



Find parametric equations for the line in which the planes 3x − 6y − 2z = 15
and 2x + y − 2z = 5 intersect.


Homework Equations





The Attempt at a Solution



<2, 1, -2> - <3, -6, -2> = <-1, 7, 0>

x = 2 - t, y = 1 + 7t, z = -2

Did I do this correctly??
 
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  • #2
Uh, no. Put the solution back into your two line equations. Does it work? I don't think so. Where did you find this 'solution method'? I think you should maybe try and find one that does.
 
  • #3
<3, -6, -2> X <2, 1, -2> = <14, 2, 15>

Then set z to 0 to get x = 3, y = -1 ==> <3, -1, 0>

x = 3 + 14t
y = -1 + 2t
z = 15t
 
  • #4
Better. Did you check by substituting your result back into the plane equations?
 
  • #5
yes it worked, got 5 and 15
 
  • #6
helpm3pl3ase said:
yes it worked, got 5 and 15

Good!
 

What are parametric equations?

Parametric equations are a way of representing curves or surfaces in terms of one or more parameters. They allow for a more precise and efficient way of describing mathematical objects.

How do parametric equations apply to the line of intersection of 3x-6y-2z=15 and 2x+y-2z=5?

In the context of these two equations, parametric equations would represent the points of intersection between the two planes. These points would be defined by parameters such as t or s, which can be used to find specific points on the line of intersection.

What is the process for finding the parametric equations for the line of intersection?

To find the parametric equations for the line of intersection, we first need to solve for one of the variables in terms of the other two. This will give us a two-variable equation, which we can then use to define the parameters for the line of intersection. We can then use these parameters to find specific points on the line.

Can parametric equations be used to find the distance between the planes 3x-6y-2z=15 and 2x+y-2z=5?

Yes, parametric equations can be used to find the distance between the planes. This can be done by finding the shortest distance between any two points on the line of intersection, which can be calculated using the formula for distance between two points in three-dimensional space.

How do parametric equations for the line of intersection relate to vector equations?

Parametric equations and vector equations are closely related, as both represent the same geometric object. The parameters in parametric equations correspond to the components of the direction vector in vector equations. Furthermore, the parametric equations can be written in vector form as well.

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