Question

let Dk=$\begin{vmatrix} 1 & 2k& 2k-1\\\ n & n^2+n+2 & n^2\\\ n & n^2+n & n^2+n+2 \end{vmatrix}$ if $∑^n_{ k=1}$ Dk=96, Then n is equal to

Answer 1

The correct Answer is: 6