Question: 2.5 (15 marks) Let be some parameter, define the matrix = [ 1 1 1 2 1 1 1 ]. (a) Find all the value(s)

2.5 (15 marks) Let be some parameter, define the matrix = [ 1 1 1 2 1 1 1 ]. (a) Find all the value(s) of so that the matrix is invertible. (5 marks) (b) If = 2, compute det( 2 1 ). (5 marks) (c) Let = 3 and = () = [ 11 12 13 21 22 23 31 32 33 ] is the adjoint of matrix , compute 1

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