Question

construa a matriz B = (bij) 3x1 sendo bij= 3i-j

Answer 1

$\left[\begin{array}{ccc}a_{11}\\a_{21}\\a_{31}\end{array}\right] = \left[\begin{array}{ccc}3\cdot1-1\\3\cdot2-1\\3\cdot3-1\end{array}\right] = \left[\begin{array}{ccc}2\\5\\8\end{array}\right]$