First slide

Introduction to matrices

Question

Construct a 2 x 3 matrix $A = [a_{ij}]$ whose element are given by ${\dot{a}}_{ij} = (\frac{3 i + 4 j}{2}) t h e n a_{13} =$
where (.) denotes the least integer function

Moderate

Solution

${\dot{a}}_{ij} = (\frac{3 i + 4 j}{2}) {\dot{a}}_{13} = (\frac{3 + 12}{2}) = (7.5) = 8$

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