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Matrices, A square matrix is one in which the number of columns is equal…
Matrices
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Operations
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Multiplication
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The numbers of each line of the first must multiply the numbers of each column of the second and then add.
Types
Transpose matrix
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If the original matrix and its transpose are equal, they are simetrical.
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Determinant
Multiply the numbers of the main diagonal, then those of the secondary diagonal, now subtract them and if the result is different from zero, the matrix has a determinant.
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In order to quickly find the inverse of a 2nd order matrix, switch the position of the numbers in the main diagonal, switch the signs of the ones in the second, and divide all by the determinant
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