Respostas

2014-07-28T16:06:26-03:00
  \left[\begin{array}{ccc}a11&a12\\a21&a22\\a31&a41\end{array}\right]
 
a11 ( i = j) = 1
a12 (i ≠ j ) = 2 . 1 - 2 = 0
a21 (i ≠ j) = 2.2 - 1 = 3
a22 (i = j) = 2
a31 (i ≠ j) = 2.3 - 1 = 5
a32 (i≠ j) = 2 .3 - 2 = 4

  \left[\begin{array}{ccc}1&0\\3&2\\5&4\end{array}\right]