Question

Ajudaaaa
Construa a matriz B= (bij) 3×1, sendo bij= 3i-j

Answer 1

Primeiramente devemos escrever a matriz genérica.
$B=\left[\begin{array}{c}b _{11} \\b _{21} \\b _{31} \end{array}\right] \\ \\ \\ B=\left[\begin{array}{c}3.1-1\\3.2-1\\3.3-1\end{array}\right] \\ \\ \\ B=\left[\begin{array}{c}2\\5\\8\end{array}\right]$