Examine the differentiability of the function:
\[
f(x)=\left\{\begin{array}{r}
x[x], \text { if ...
Examine the differentiability of the function:
\[
f(x)=\left\{\begin{array}{r}
x[x], \text { if } 0 \leq x2 \\
(x-1) x, \text { if } 2 \leq x3
\end{array} \text { at } x=2\right.
\]
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