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# Identify Points of Non-differentiability, Given a Graph

APCALC-9ILYMD

Consider the graph of $g(x)$ shown below.

For what values of $x$ in the open interval $(-3,3)$ is $g$ not differentiable?

A

$1$ only

B

$-1$ and $1$ only

C

$-2$ and $1$ only

D

$-2$, $-1$ and $1$ only