eMatrixSum

Example Find the sum of the matrix $A$

and

$\displaystyle A = \left(\begin{array}{rr} 2&-3\\ 4&2 \end{array}\right), \ \ \ B = \left(\begin{array}{rr} -1&2\\ 3&0 \end{array}\right )$

Answer We define the sum of $A = (a_{ij})$ and $B = (b_{ij})$ by $(a_{ij}+b_{ij})$ . Thus, we add the corresponding elements of $A$ and $B$ .

$A + B = \left(\begin{array}{rr} 2&\!\!-3\\ 4&\!\!2 \end{array}\right) + \left(... ...ay}\right) = \left(\begin{array}{rr} 1&\!\!-1\\ 7&\!\!2 \end{array}\right ) .$

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