1 0 1. This matrix | 6 8 0 is said to be a/ an: 9 0 -4 A. diagonal matrix B. identity matrix C. lower triangular matrix D. upper triangular matrix x 6 Given the matrix A= 2 3 2. what is the value of x if A is a singular matrix? А. 1 В. 3 С. 4 D. 8 1 2 3 3. Consider the matrix A = 4 1 5.What is 1 7 5 the cofactor of the element a,, ? A. - 44 В. — 11 С. 11 D. 44

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Q: 1 0 0 -1 -2 Ais a 3 x 5 matrix. If AC = 0 1 0 3 4 then the 1 -5 6 size of C is

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