Question 3.1. Let's think of the set of n-by-n matrices as R² by using the matrix entries as coordinates. Let DC R² be the subset of matrices with determinant zero. Select all the statements which are true. (a) The subset D is closed under rescaling. (b) The subset D is closed under addition. (c) The subset D contains the origin. (d) The subset D is an affine subspace.

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Q: question 2

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Q: [1 2 3] A = 4 5 306 [9 6 7 [14] B = 8 6 [62]

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