CHAPTER 8 Matrices and Determinants
Matrices and Determinants Section 8 1 Matrices and Systems of Equations You should be able to use elementary row operations to produce a row-echelon form (or reduced row-echelon form) of a matrix 1 Interchange two rows 2 Multiply a row by a nonzero constant 3 Add a multiple of one row to another row
Determinants of Matrices - Montgomery College
For higher rank matrices, we can use cofactors to calculate their determinants: The cofactor of an element in row I and column J is the determinant of the matrix that remains after row I and column J are removed:
CHAPTER 8: MATRICES and DETERMINANTS
(Section 8 1: Matrices and Determinants) 8 07 3) Row Replacement (This is perhaps poorly named, since ERO types 1 and 2 may also be viewed as “row replacements” in a literal sense ) When we solve a system using augmented matrices, We can add a multiple of one row to another row Technical Note: This combines ideas from the Row Rescaling ERO
Determinants & Inverse Matrices
Determinants & Inverse Matrices The determinant of the 2⇥2matrix ab cd is the number adcb The above sentence is abbreviated as det ab cd = adcb
Determinants, part II Math 130 Linear Algebra
Determinants, part II Math 130 Linear Algebra D Joyce, Fall 2013 So far we’ve only de ned determinants of 2 2 and 3 matrices The 2 2 determinants had 2 terms, while the determinants had 6 terms There are many ways that general n n determinants can be de ned We’ll rst de ne
Determinants of 3×3 Matrices Date Period - Kuta Software LLC
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a Permutations and determinants a Math 130 Linear Algebra
determinants The determinant of a 4 4 matrix Let’s take a generic matrix A= 2 6 6 4 a 11 a 12 a 13 a 14 a 21 a 22 a 23 a 24 a 31 a 32 a 33 a 34 a 41 a 42 a 43 a 44 3 7 7 5 Look at all 4 = 24 permutations of the set f1;2;3;4gand their parities Even parities are in-dicated with +, odd with 1234 + 2134 3124 + 4123 1243 2143 + 3142 4132
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