I have a 3X3 matrix A with a determinant 2. Find det (2A) The answer is supposedly 16, but I don't understand why this is... I'm assuming it is because the determinant is multiplied by 2 three times because the matrix is a 3X3...
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Originally Posted by Hellreaver I have a 3X3 matrix A with a determinant 2. Find det (2A) The answer is supposedly 16, but I don't understand why this is... I'm assuming it is because the determinant is multiplied by 2 three times because the matrix is a 3X3... Consider: 1. What happens to the determinant of a matrix when you multiply a row by a constant ...? 2. What happens to the rows of a matrix when you multiply the matrix by a constant ....? Do you see now?
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