To 0 2 lo o 4 68. the determinant of the matrix 10 0 0 0 21 0 10 2 2 0 0 0 1 20 0 is lo o 2 1 0 0 0 2 0 0 1 0 2 0 0 0 0 1 1 (b)-9 (c)-27 (d) 1 (a) 0

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