Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) If A and B two are 3x3 matrices, then which one of the following is not true - Sarthaks eConnect

If A and B two are 3x3 matrices, then which one of the following is not true:

`(A+B)^1=A^1+B^1`

`(AB)^1=A^1B^1`

det(AB)=det (A) det (B)

A(adj A)`=|A|I_3`