Proving Vector Independence: A & B Not Parallel

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SUMMARY

Two planar vectors, A and B, are linearly independent if and only if they are not parallel. This conclusion is based on the definitions of independent and dependent vectors, which state that independent vectors span the entire two-dimensional space. If vectors A and B are not parallel, they intersect at a point, confirming their independence. Understanding these definitions is crucial for proving vector independence in a two-dimensional plane.

PREREQUISITES
  • Understanding of linear independence and dependence in vector spaces
  • Familiarity with two-dimensional vector geometry
  • Knowledge of vector spanning and dimensionality concepts
  • Basic proficiency in mathematical proofs and definitions
NEXT STEPS
  • Study the definitions of linear independence and dependence in detail
  • Explore the geometric interpretation of vectors in two-dimensional space
  • Learn about spanning sets and their significance in linear algebra
  • Practice proving vector independence with various examples
USEFUL FOR

Students studying linear algebra, mathematicians interested in vector spaces, and educators teaching concepts of vector independence and geometry.

dracolnyte
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Homework Statement


Show that two planar vectors a and b are linearly independent if and only if they are not parallel.

The Attempt at a Solution


I know that, if they are not parallel, they will meet and cross in a line.
What else should I know before proving this question?
 
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You certainly should know the definition of "independent vectors"! I don't think it will help to think "geometrically" here. Just use the definitions of "independent" and "dependent" vectors and the fact that, since the plane is two dimensional, two independent vectors must span the entire space.
 

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