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In thematrix $\mathrm{A}=\left[\begin{array}{ccc}\mathrm{a} & 1 & \mathrm{x} \\ 2 & \sqrt{3} & \mathrm{x}^2-\mathrm{y} \\ 0 & 5 & \frac{-2}{5}\end{array}\right]$, write
(i) the order of the matrix A.
(ii) the number of elements.
(iii) elements $a_{23}, a_{31}$ and $a_{12}$.
(i) the order of the matrix A.
(ii) the number of elements.
(iii) elements $a_{23}, a_{31}$ and $a_{12}$.
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Wehave, $\mathrm{A}=\left[\begin{array}{ccc}\mathrm{a} & 1 & \mathrm{x} \\ 2 & \sqrt{3} & \mathrm{x}^2-\mathrm{y} \\ 0 & 5 & \frac{-2}{5}\end{array}\right]$
(i) the order of matrix $\mathrm{A}=3 \times 3$
(ii) the number of elements $=3 \times 3=9$
(iii) $\mathrm{a}_{23}=\mathrm{x}^2-\mathrm{y}, \mathrm{a}_{31}=0, \mathrm{a}_{12}=1$
(i) the order of matrix $\mathrm{A}=3 \times 3$
(ii) the number of elements $=3 \times 3=9$
(iii) $\mathrm{a}_{23}=\mathrm{x}^2-\mathrm{y}, \mathrm{a}_{31}=0, \mathrm{a}_{12}=1$
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