Let A = [(1, 0, 0), (2, 1, 0), (3, 2, 1)]. If U1, U2 and U3 are columns matrices satisfying
AU1 = [1, 0, 0], AU2 = [2, 3, 0], AU3 = [2, 3, 1] and U is 3 × 3 matrix whose columns are U1, U2 and U3 then
The value of [3, 2, 0] U [3, 2, 0] is
(A) 5
(B) 5/2
(C) 4
(D) 3/2