Construct a 3 x 4 matrix, whose elements are given by :

• ${a_{ij}} = \cfrac{1}{2}| - 3i + j|$

• ${a_{ij}} = 2i - j$

.:

A 3 × 4 matrix has 3 rows and 4 columns. In general, 3 × 4 matrix is given by
$A = {[{a_{ij}}]_{3 \times 4}} = \left[ {\begin{array}{cccccccccccccccccccc}{{a_{11}}}&{{a_{12}}}&{{a_{13}}}&{{a_{14}}}\\{{a_{21}}}&{{a_{22}}}&{{a_{23}}}&{{a_{24}}}\\{{a_{31}}}&{{a_{32}}}&{{a_{33}}}&{{a_{34}}}\end{array}} \right]$