Question

Sendo:

K= (kij)3x1= i²+2j

A matriz K será:

Answer 1

Lembrando que "i" indica a linha do elemento e "j", a coluna, temos:

           $K~=~\left[\begin{array}{ccc}k_{11}\\k_{21}\\k_{31}\end{array}\right]\\\\\\K~=~\left[\begin{array}{ccc}(1)^2+2~.~(1)\\(2)^2+2~.~(1)\\(3)^2+2~.~(1)\end{array}\right]\\\\\\K~=~\left[\begin{array}{ccc}1+2\\4+2\\9+2\end{array}\right]\\\\\\K~=~\left[\begin{array}{ccc}3\\6\\11\end{array}\right]$