Mathematics - Matrix Question with Solution | TestHub

Let $A=\left(\begin{array}{lll}1& 0& 0\\ 2& 1& 0\\ 3& 2& 1\end{array}\right)$. If $u_1$ and $u_2$ are column matrices such that $A{u}_1=\left(\begin{array}{l}1\\ 0\\ 0\end{array}\right)$ and $A{u}_2=\left(\begin{array}{l}0\\ 1\\ 0\end{array}\right)$, then $u_1+u_2$ is equal to