Let aequalsleft bracket start 3 by 3 matrix 1st row 1st column 1 2nd column negative 4 3rd column negative 3 2nd row 1st column negative 4 2nd column 4 3rd column 0 3rd row 1st column 2 2nd column 4 3rd column 6 endmatrix right bracket and bequalsleft bracket start 3 by 1 matrix 1st row 1st column b 1 2nd row 1st column b 2 3rd row 1st column b 3 endmatrix right bracket . show that the equation axequalsb does not have a solution for all possible b, and describe the set of all b for which axequalsb does have a solution.