Chapter 1.1, Problem 8ES

In these exercises, make reasonable assumptions about the graph of the indicated function outside of the region depicted.

For the function $\varphi$ graphed in the accompanying figure, find

(a) $\underset{x\to 4^{-}}{\lim }\varphi \left(x\right)$

(b) $\underset{x\to 4^{+}}{\lim }\varphi \left(x\right)$

(c) $\underset{x\to 4}{\lim }\varphi \left(x\right)$

(d) $\varphi \left(4\right)$ .