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[" 12.Let "d in R," and "],[A=[[-2,4+d]]...

[" 12.Let "d in R," and "],[A=[[-2,4+d]],[A=,[[-2,4+d,(sin theta)-2],[1,(sin theta)+2,d],[5,(2sin theta)-d,(-sin theta)+2+2d]]],[theta in[0,2 pi]." If the minimum value of "det(A)" is "],[8," then a value of "d" is: "]

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