Proving Consistency of Ax=b: A Fundamental Property of Matrices

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SUMMARY

The discussion centers on proving the consistency of the equation Ax=b, where A is an mxn matrix. It is established that Ax=b is consistent for all b if and only if the rank of matrix A equals m. Participants explore the implications of augmenting matrix A with vector b and the necessity of achieving a specific number of non-zero rows during row reduction to ensure a consistent solution.

PREREQUISITES
  • Understanding of matrix rank and its implications
  • Familiarity with row reduction techniques
  • Knowledge of augmented matrices
  • Basic concepts of linear algebra
NEXT STEPS
  • Study the properties of matrix rank in linear systems
  • Learn about row reduction methods and their applications
  • Explore the concept of augmented matrices in depth
  • Investigate the relationship between rank and solutions of linear equations
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Students and educators in linear algebra, mathematicians focusing on matrix theory, and anyone involved in solving systems of linear equations.

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Homework Statement


Let A be mxn prove Ax=b is consistent for all b if and only if rank(A) = m

Homework Equations


See above

The Attempt at a Solution



I do not know where to begin on this. Any hints would be great
 
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What does it mean for a system to be consistent?

If you augment matrix A and b to get [A|b] and you row reduce, how many rows of non-zeros would you need to get a consistent solution?
 

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