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3) Evaluate, 3 23, 102, 18, 36, 2 23, 3, 4, 2 3, 17, 3, Ansever, i) A =0, 6(17), 6(3) 6(5), 一, 3, 4, 17, 3, 17, to, 17, 3, Two MARK QUESTIONS:, 1> Prove the following properties, i> In case of third order determinant, the value of, the determinant is unaltered if the rous are, changed into columns and columns into rows, i17 1 any two rows (or columns) of a determinant, are interchanged, then sign of the determinant, changes, i> If amy two rous (or columns) of a determinant, are identical then the vahu of the determiuant is zero., Answer : (For proofs refer tent books), b, C,, az b, C2, i) Let A=, = a (6,-G)-b,(9G-92) +c, Casbg-ab)