2014 TWO(c)

The graph below shows the function $y=f(x)$.

For the function $f(x)$ above:

(i) Find the value(s) for $x$ that meet the following conditions:

1. $f(x)$ is not differentiable: ______________________________

2. $f^{\prime \prime }(x)<0$: ______________________________

3. $f(x)$ is not defined: ______________________________

(ii) What is the value of $f(2)$? ______________________________

*State clearly if the value does not exist.*

(iii) What is the value of ${\lim }_{x\to -1}f(x)$? ______________________________

*State clearly if the value does not exist.*