Cramer's rule can be applied to solve Ax=bA\mathbf{x} = \mathbf{b}Ax=b when which condition holds?
The rank of AAA equals the rank of [A∣b][A|\mathbf{b}][A∣b]
AAA is a square matrix with det(A)≠0(A) \neq 0(A)=0
AAA is invertible OR AAA is square with nonzero determinant
Both (b) and (c)