Answer
$$\left\langle 9, 12, \frac{1}{3}\right\rangle.$$
Work Step by Step
$$
\lim _{t \rightarrow 3}\left\langle t^{2}, 4 t, \frac{1}{t}\right\rangle=
\left\langle \lim _{t \rightarrow 3}t^{2}, 4\lim _{t \rightarrow 3} t, \lim _{t \rightarrow 3}\frac{1}{t}\right\rangle\\=\left\langle 9, 12, \frac{1}{3}\right\rangle.
$$
