Fourth axis: determinants and inverses of the matrix
Section outline
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Define the determinant of an array
Let A be a square matrix. We define the determinant of a matrix to be a real number, which we denote by det (A).
Which is determined according to the rank of the matrix.
The determinant of a matrix of rank 1.1 is the number itself.
For matrix rank 2, its determinant is:
Example:
Find the value of the determinant
the solution:
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