Nonhomogeneous system of linear equations

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SUMMARY

The discussion focuses on solving a nonhomogeneous system of linear equations represented by the equations x - 2y + z = 4, y - z = 3, and (a^2 - a - 2)z = a + 1. Participants suggest using an augmented matrix and applying row operations to analyze the system. Additionally, factorization of the equation (a^2 - a - 2)z = a + 1 into (a + 1)(a - 2)z = a + 1 is recommended to determine the conditions under which the system has no solution, one solution, or many solutions.

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  • Understanding of linear algebra concepts, specifically systems of linear equations.
  • Familiarity with augmented matrices and row operations.
  • Basic knowledge of MATLAB for matrix manipulation.
  • Ability to factor quadratic equations and analyze their solutions.
NEXT STEPS
  • Learn how to set up and manipulate augmented matrices in linear algebra.
  • Explore MATLAB's matrix inversion functions and their applications in solving linear systems.
  • Study the conditions for the existence of solutions in systems of equations, including consistency and dependency.
  • Investigate the factorization of quadratic equations and their implications for solution sets.
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Students and professionals in mathematics, particularly those studying linear algebra, as well as educators looking to enhance their teaching of systems of equations and their solutions.

salistoun
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Hi all,

How do u go about doing this question?

x - 2y +z =4
y- z =3
(a^2 - a - 2)z = a+1

Determine values of a for which the system has no solution, one solution and many solutions

Stephen
 
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salistoun said:
Hi all,

How do u go about doing this question?

x - 2y +z =4
y- z =3
(a^2 - a - 2)z = a+1

Determine values of a for which the system has no solution, one solution and many solutions

Stephen

Hey Stephen and welcome to the forums.

You should for this problem set up an augmented system and apply row-operations.

You could use MATLAB though and invert the matrix in terms an unknown number a and then check that you don't get an inconsistent system since a is in the RHS vector.

Show us what augmented system have and row operations to get your reduced system
 
What Chiro said is true, but it's probably quicker to start by factorizing ## (a^2 - a - 2)z = a+1## into ## (a+1)(a-2)z = a+1 ##, and thinking about when that equation has zero, one, or many solutions.
 

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