Five marks exercise problems II — task. Mathematics State Board, Class 10.

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1. If \(A =\)

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

, \(B =\)

(\begin{array}{l} 5 & 7 \\ 3 & 3 \\ 1 & 0 \end{array})

then, verify that

(i) \(A + B = B + A\)

(ii) \(A + (-A) = (-A) + A = 0\)

2. If \(A =\)

(\begin{array}{l} 4 & 3 & 1 \\ 2 & 3 & - 8 \\ 1 & 0 & - 4 \end{array})

, \(B =\)

(\begin{array}{l} 2 & 3 & 4 \\ 1 & 9 & 2 \\ - 7 & 1 & - 1 \end{array})

and \(C =\)

(\begin{array}{l} 8 & 3 & 4 \\ 1 & - 2 & 3 \\ 2 & 4 & - 1 \end{array})

then verify that \(A + (B + C) = (A + B) + C\).

Important!

This is a self-assessment task. Solve this question and assess the solution steps after completing the exercise.

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5. Five marks exercise problems II