Ononot — Let A = \begin{pmatrix} 1 & 1 & 0 \\ 0 & 2 & 1 \\ 0 & 0 & 3

Matriceshard

0:00.0

Let $A = \begin{pmatrix} 1 & 1 & 0 \\ 0 & 2 & 1 \\ 0 & 0 & 3 \end{pmatrix}$ (upper triangular). Which statement about the eigenvalues and invertibility of $A$ is correct?