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Q49Section C (Section C)49 of 60

Determinant of a product of column-replaced identities

For j=1,2,…,5j=1,2,…,5, let PjP_j be the matrix of order 5×55\times5 obtained by replacing the jthj^{th} column of the identity matrix of order 5×55\times5 with the column vector v=(54321)Tv=(5 4 3 2 1)^T. Then the determinant of the matrix product P1P2P3P4P5P_1P_2P_3P_4P_5 is __________________

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