Two marks example problem III — task. Mathematics State Board, Class 10.

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If \(A =\)

(\begin{array}{l} 7 & 8 & 6 \\ 1 & 3 & 9 \\ - 4 & 3 & - 1 \end{array})

, \(B =\)

(\begin{array}{l} 4 & 11 & - 3 \\ - 1 & 2 & 4 \\ 7 & 5 & 0 \end{array})

then find \(2A + B\).

Answer:

\(2A + B =\)

(\begin{array}{l} i & i & i \\ i & i & i \\ i & i & i \end{array})

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4. Two marks example problem III