## Discrete Mathematics with Applications 4th Edition

There are 2 elements in $T_{2}$ and 2 elements in $T_{-3}$. There is 1 element in $T_{1}$ and 1 element in $T_{0}$.
$T_{2}=\{2,4\}$ and $T_{-3}=\{-3,9\}$. $T_{1}=\{1,1^{2}\}=\{1,1\}=\{1\}$ and $T_{0}=\{0,0^{2}\}=\{0,0\}=\{0\}$.