Question

contrua a matriz B =(bij)³×₁ bij=3i-j

Answer 1

$B=(b_{i,j})_{3\times1}=3i-j\\\\b_{1,1}=3(1)-(1)\to b_{1,1}=2\\\\b_{2,1}=3(2)-(1)\to b_{2,1}=5\\\\b_{3,1}=3(3)-(1)\to b_{3,1}=8\\\\\\B=\left[\begin{array}{ccc}b_{1,1}\\b_{2,1}\\b_{3,1}\end{array}\right]\longrightarrow B=\left[\begin{array}{ccc}2\\5\\8\end{array}\right]$