$10$ Chapter $\frac{1}{?}$ Limits and Continuity

QUICK CHECK EXERCISES $1\mathrm{.}1($See page $13$ for answers.$)$

We write $\underset{xa}{lim}f(x)=L$ provided the values of

$($b$)\underset{x{2}^{-}}{lim}f(x)=$ can be made as close to as desired, by taking valucs of sufficiently close to $q,($c$)\underset{x{2}^{+}}{lim}f(x)=$ but not

$($d$)\underset{x{3}^{-}}{lim}f(x)=$