Intersection line of two planes

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SUMMARY

The discussion focuses on finding the equation of the line of intersection between two planes defined by the equations 2x + 3y + 5z = 2 and 4x + 2y + z = 11. It is established that there is a unique line of intersection, and the equation of this line will involve a parameter, typically one of the variables, such as z. The solution process involves expressing two variables in terms of the third, allowing for a parametric representation of the line.

PREREQUISITES
  • Understanding of linear equations in three dimensions
  • Knowledge of parametric equations
  • Familiarity with solving systems of equations
  • Basic concepts of geometry related to planes
NEXT STEPS
  • Study the method for deriving parametric equations from linear equations
  • Explore the concept of vector representation of lines in 3D space
  • Learn about the geometric interpretation of the intersection of planes
  • Investigate the implications of unique versus infinite solutions in systems of equations
USEFUL FOR

Students of mathematics, educators teaching geometry, and anyone interested in understanding the intersection of planes in three-dimensional space.

debwaldy
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Hello,so this is prob a v v basic question but I am confused as to how one find the equation of the line of intersection of two planes:e.g. 2x + 3y + 5z = 2 & 4x + 2y + z = 11. is there just one unique solution or will the solution involve parameters??eeks :bugeye:
 
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debwaldy said:
Hello,so this is prob a v v basic question but I am confused as to how one find the equation of the line of intersection of two planes:e.g. 2x + 3y + 5z = 2 & 4x + 2y + z = 11. is there just one unique solution or will the solution involve parameters??eeks :bugeye:

Can a system of two equations involving three unknowns have a unique solution?
 
is there just one unique solution or will the solution involve parameters??
The question asks for the line at which the two planes intersect. Yes there is a unique line of intersection and, yes, the equation of a line in 3 dimensions involves a parameter!

In general, you can solve two equations for two unknowns. Here, you can solve for two of the unknowns (say, x and y) in terms of the third (z). Then you can use that third unknown as the parameter.
 

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