(5 points) A nxn matrix A is said to be nonsingular, if
(1) A is non-invertible.
(2) there exists a multiplicative inverse matix B such that A is row cquivalent to B.
(3) the determinate of A is nonzero.
(4) Ax=O where x is nonzero vector.
(5) A is row equivalent to L
阿摩線上測驗
登入