Linear System Solutions and the Role of Scalar Multiplication

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SUMMARY

The discussion centers on the properties of solutions to nonhomogeneous linear systems represented by the equation Ax=b. It is established that if vectors v and u are solutions, then any linear combination ru + sv is also a solution for any real values of r and s. This property does not hold for homogeneous systems, as demonstrated through counterexamples. The discussion emphasizes the importance of understanding parametric vector forms when dealing with infinite solutions in nonhomogeneous systems.

PREREQUISITES
  • Understanding of linear algebra concepts, specifically linear combinations
  • Familiarity with nonhomogeneous and homogeneous linear systems
  • Knowledge of matrix equations and their representations
  • Experience with parametric vector forms in solution sets
NEXT STEPS
  • Study the properties of linear combinations in linear algebra
  • Learn about the implications of infinite solutions in nonhomogeneous systems
  • Explore counterexamples in linear algebra to solidify understanding
  • Investigate the use of parametric vector forms in solving linear equations
USEFUL FOR

Students and professionals in mathematics, particularly those studying linear algebra, as well as educators seeking to clarify the concepts of linear systems and their solutions.

golriz
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I have a question:
If the vectors of v & u are solutions of the nonhomogeneous linear system Ax=b, then ru+sv is a solution of the nonhomogeneous system for any real values of r and s.
is this statement true?
is this statement true for homogeneous systems too?
 
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Hint: When a nonhomogeneous linear system has infinite solutions, then the general solutions can be written in parametric vector form.

This can be used to answer both questions.
 
You should be able to find a counterexample easily for the first question. For the second, try writing the matrix equation for Ax=b using ru+sv.
 

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