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Construct a 3×4 matrix A = [ai j] whose elements ai j are given by: ai j = ½ |-3i + j|

Given \[{{a}_{i\text{ }j}}~=\text{ }{\scriptscriptstyle 1\!/\!{ }_2}\text{ }\left| -3i\text{ }+\text{ }j \right|\]

Let \[A\text{ }=\text{ }{{[{{a}_{i\text{ }j}}]}_{2\times 3}}\]

So, the elements in a \[3\times 4\]matrix are

\[{{a}_{11}},\text{ }{{a}_{12}},\text{ }{{a}_{13}},\text{ }{{a}_{14,}}~{{a}_{21}},\text{ }{{a}_{22}},\text{ }{{a}_{23}},\text{ }{{a}_{24}},\text{ }{{a}_{31,~}}{{a}_{32,~}}{{a}_{33,~}}{{a}_{34}}\]

\[A\text{ }=\]
RD Sharma Solutions for Class 12 Maths Chapter 5 Image 81

\[{{a}_{11}}~=\]

\[{{a}_{12}}~=\]

\[{{a}_{13}}~=\]

\[{{a}_{14}}~=\]

\[{{a}_{21}}~=\]

\[{{a}_{22}}~=\]

\[{{a}_{23}}~=\]

\[{{a}_{24\text{ }=}}\]

\[{{a}_{31}}~=\]

\[{{a}_{32}}~=\]

\[{{a}_{33}}~=\]

\[{{a}_{34}}~=\]

Substituting these values in matrix A we get,

\[A\text{ }=\]

Multiplying by negative sign we get,