Suppose the only solution of AX-B is the zero matrix (A is nxn and B is nx1). Then the RREF of A | B is IC where the sum of the entries of C is Blank 1

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Q: 4. If C = {x € R | cot x = 0}, then, |C| = 3. %3D 5. If K = {8n|1 < n< 10}, then |K| = 10. %3D %3D

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