If U-n -n 1 5 n-2 2N-1 2N-1 n-3 3N-2 3N then find the value of -extstyle-n-1-NU-n

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If U_n =n 1...

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If U_n =\begin{vmatrix}n&1&5 n^2&2N+1&2N+1 n^3&3N^2&3N\end{vmatrix} then find the value of {†extstyle∑_{n=1}^N}U_n

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