Question

Matriz D= (Dij)1×3 , onde Dij=i-j

Answer 1

$Di,j=i-j \\ D1,1=1-1=0 \\ D1,2=1-2=-1 \\ D1,3=1-3=-2\\ D=\left[\begin{array}{ccc}0&-1&-2\\\end{array}\right]$