ALGUEM AJUDA?? 1- Dada as matrizes A= 1 3 e B= -1 2 2 4 3 1 , calcular o determinante de (A + B.... Pergunta de ideia deJacque

April 2020 1 66 Report

ALGUEM AJUDA??

1- Dada as matrizes

A= 1 3 e B= -1 2

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

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Celio

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Olá, Jacque.

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

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