csat-suneung 2013 Q1

csat-suneung · South-Korea · csat__math-humanities 2 marks Matrices Matrix Algebra and Product Properties

For two matrices $A = \left( \begin{array} { l l } 0 & 0 \\ 1 & 1 \end{array} \right) , B = \left( \begin{array} { l l } 1 & 0 \\ 1 & 1 \end{array} \right)$, what is the sum of all entries of the matrix $2A + B$? [2 points]
(1) 10
(2) 9
(3) 8
(4) 7
(5) 6

For two matrices $A = \left( \begin{array} { l l } 0 & 0 \\ 1 & 1 \end{array} \right) , B = \left( \begin{array} { l l } 1 & 0 \\ 1 & 1 \end{array} \right)$, what is the sum of all entries of the matrix $2A + B$? [2 points]\\
(1) 10\\
(2) 9\\
(3) 8\\
(4) 7\\
(5) 6

Paper Questions

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