Question

5. Consider the matrix 1 1 2 A= 2 b 3 11 a/ . Which of the following is true? (a) rank(A)=1 if b = 2 and for every value of a (b) rank(A)=2 if b=2 and for every value of a #2 (c) rank(A)=1 if b=1 and a = 2 (d) rank(A)=1 if b = 2 and a = 2 (e) None of the above