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Matrices — Mathematics STD 10 — Question

ICSE BoardEnglish MediumSTD 10MathematicsMatrices2 Marks
Question
Write the additive inverse of matrices A, B and C Where A = [6, -5]; B =
$\left[\begin{array}{cc}-2 & 0 \\ 4 & -1\end{array}\right]$ and $C=\left[\begin{array}{c}-7 \\ 4\end{array}\right]$
✓

Answer

We know additive inverse of a matrix is its negative
The additive inverse of A = -A = -[6 -5] = [-6 5]
Additive inverse of B = -B =$-\left[\begin{array}{cc}-2 & 0 \\ 4 & -1\end{array}\right]=\left[\begin{array}{cc}2 & 0 \\ -4 & 1\end{array}\right]$
Additive inverse of C = -C =$-C=-\left[\begin{array}{c}-7 \\ 4\end{array}\right]=\left[\begin{array}{c}7 \\ -4\end{array}\right]$

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