MATH 112 Lecture 16: Invertible 2x2 and 3x3 matrices, determinants, theorem, practice problems with cofactor expansion
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MATH 112 Lecture 15: Theorem, proof, solving linear systems with the inverse of a matrix, properties of the inverse, when a square matrix is invertible, elementary matrix, invertible matrix theorem
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MATH 112 Lecture 16: Invertible 2x2 and 3x3 matrices, determinants, theorem, practice problems with cofactor expansion
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