Respostas

2014-06-10T10:14:21-03:00
Determinante de matrizes de 2°ordem Fórmula :  \left[\begin{array}{ccc} a_{11} & a_{12}\\ a_{21}& a_{22}\end{array}\right]

Determinante = a_{11} . a_{22} - a_{12} . a_{21}

A)  \left[\begin{array}{ccc}1&3\\ 0&2\end{array}\right]  = 1.2 - 0.3 = 2-0 = 2

B)  \left[\begin{array}{ccc}5&10\\ 2&4\end{array}\right]  = 5.4 - 10.2 = 20 - 20 = 0

C)  \left[\begin{array}{ccc}2&3\\ 4&5\end{array}\right]  = 2.5 - 3.4 = 10 - 12 = -2

D)   \left[\begin{array}{ccc}1&2\\ 1&3\end{array}\right]  = 1.3 - 2.1 = 3-2 = 1
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