38625254
Description
Quiz by BOTE FÉ NA MATEMÁTICA, updated more than 1 year ago
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Created by BOTE FÉ NA MATEMÁTICA
over 1 year ago
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Question 1
Question
Dadas as matrizes \(A = \left( \begin{array}{rr}
3 & -1 \\
4 & 5
\end{array}\right)\) e \(B = \left( \begin{array}{rr}
2 & 3 \\
-8 & 10
\end{array}\right)\), marque a alternativa que fornece \(3A-\frac{1}{2}B\).
Answer
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\(\left( \begin{array}{rr} 8 & -\frac{9}{2} \\ 16 & 10 \end{array}\right)\)
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\(\left( \begin{array}{rr} 2 & -\frac{4}{2} \\ 16 & 10 \end{array}\right)\)
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\(\left( \begin{array}{rr} -8 & \frac{9}{2} \\ -16 & -10 \end{array}\right)\)
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\(\left( \begin{array}{rr} 3 & -\frac{9}{2} \\ 6 & 1 \end{array}\right)\)
Question 2
Question
Calcular a matriz \(X\) na equação \(3X-A+2B=0\), sabendo que \(A=\left( \begin{array}{rr}
8 & -5 \\
-6 & 1
\end{array}\right)\), \(B = \left( \begin{array}{rr}
1 & \frac{1}{2} \\
3 & 4
\end{array}\right)\) e \(0\) é a matriz nula.
Answer
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\(X=\left( \begin{array}{rr} 2 & -2 \\ -4 & -\frac{7}{3} \end{array}\right)\)
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\(X=\left( \begin{array}{rr} -2 & 2 \\ 4 & -\frac{7}{3} \end{array}\right)\)
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\(X=\left( \begin{array}{rr} 1 & -1 \\ -2 & -\frac{4}{3} \end{array}\right)\)
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