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If Dk=|[1,n,n],[2k,n^2+n+2,n^2+n],[2k-1,...

If `D_k=|[1,n,n],[2k,n^2+n+2,n^2+n],[2k-1,n^2,n^2+n+2]|` and `sum_(k=1)^n D_k=48 `,then n equals (a)`4` (b)` 6` (c)` 8` (d) none of these

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