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# matrix_adj - ECON1003 Mathematics for the Social Sciences...

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1 ECON1003 Mathematics for the Social Sciences Topic 5: Matrix Algebra Lecturer: Marlon Tracey

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2 Objective At the end of this topic, students should be able to: Do operations on matrices. Determine the determinant and inverse of a matrix. Identify the properties of the inverse. Solve a given system of equations using matrix inversion and Cramer’s rule.
3 Outline Introduction Definition of a matrix Types of matrices Matrix addition and subtraction Multiplication and transposition The determinant of a 2 x 2 and a 3 x 3 matrices. The inverse of a 2 x 2. Matrix solution of 2 x 2 and 3 x 3 systems of linear equations.

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