Matemática, perguntado por jacque, 1 ano atrás

ALGUEM  AJUDA??

 

1- Dada as matrizes

 

A=  1   3         e    B=  -1  2

       2   4                       3  1       , calcular o determinante de (A + B ) ^t

Soluções para a tarefa

Respondido por Celio
2

Olá, Jacque.

 

<var>A=\left[\begin{array}{cc}1 &amp; 3 \\ 2 &amp; 4 \end{array}\right], B+\left[\begin{array}{cc}-1 &amp; 2 \\ 3 &amp; 1 \end{array}\right]\\\\\\ A+B=\left[\begin{array}{cc}1 -1&amp; 3 +2 \\ 2+3 &amp; 4+1 \end{array}\right]=\left[\begin{array}{cc}0&amp; 5 \\ 5&amp; 5 \end{array}\right]\\\\\\ (A+B)^t=\left[\begin{array}{cc}0&amp; 5 \\ 5&amp; 5 \end{array}\right]\\\\\\ det(A + B ) ^t=0\cdot5-5\cdot5=\boxed{-25}</var>

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