Introduction to linear equations and matrices
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Learn how to solve systems of linear equations using matrices in this free course. Discover the method of Gauss-Jordan elimination and matrix operations. Determine invertibility and evaluate determinants. Enhance your mathematical skills today.
In this free course, matrices are used as a concise way of representing systems of linear equations which occur frequently in mathematics. Section 1 looks at simultaneous linear equations in two and three unknowns and then generalises the ideas to systems of linear equations. Section 2 develops a strategy for solving systems of linear equations. Section 3 looks at the algebra of matrices and shows that matrices can be thought of as a generalisation of vectors. Section 4 introduces the inverse of a matrix. Section 5 uses systems of linear equations to introduce the determinant of a square matrix.
Course learning outcomes
After studying this course, you should be able to:
Use the method of Gauss-Jordan elimination to find the solutions of systems of simultaneous linear equations
Solve a system of linear equations by row-reducing its augmented form
Perform the matrix operations of addition, multiplication and transposition and express a system of simultaneous linear equations in matrix form
Determine whether or not a given matrix is invertible and if it is, find its inverse
Evaluate the determinant of a 2 x 2 or 3 x 3 matrix and use the determinant to determine whether or not a given 2 x 2 matrix is invertible.
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