\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
For what values of \(t \in \mathbb{R}\) is \(A(t) = \begin{pmatrix} 1 & 1 & 1 \\ 1 & t & 1 \\ 1 & 1 & t \end{pmatrix}\) invertible? Use Gauss-Jordan.
Capture an image of your work. AI teacher feedback takes approximately 10 seconds.