Solve equation Ax = y, where A and y are known

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SUMMARY

The discussion focuses on solving the matrix equation Ax = y, where A is a 3x3 matrix and y is a 3x1 vector. The matrix A is defined as {{2, 0, 1}, {1, 1, 4}, {2, 2, 1}} and the vector y as {{1}, {1}, {1}}. Participants suggest three methods for solving this equation: row reduction, multiplying by the inverse of A, and applying Cramer's rule. Each method leverages basic matrix operations to find the solution for the vector x.

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  • Understanding of matrix operations, including addition and multiplication.
  • Familiarity with row reduction techniques for solving linear systems.
  • Knowledge of matrix inverses and their application in solving equations.
  • Concept of determinants and their role in Cramer's rule.
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  • Learn how to calculate the inverse of a matrix using Gaussian elimination.
  • Explore Cramer's rule and its application in solving systems of linear equations.
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Homework Statement


Solve for x: Ax = y.

A = {{2 0 1},
{1 1 4},
{2 2 1}}

y = {{1},
{1},
{1}}


Homework Equations


Basic Matrix operations
_________________________

I have a vague idea how I'm supposed to do this, but I have no attempt yet.. eigenvalues and eigenvectors come to mind..in some way :frown:
 
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Three possibilities come to mind:
Row reduction
Multiply by A inverse
Cramer's rule (determinants)

Try what you know.
 

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