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The graph of the function is shown below. Of the following options, at what values of is the…
The graph of the function $f$ is shown below.
Of the following options, at what values of $x$ is the function $f$ NOT differentiable?
- (a)At $x = 0$ and $x = 2$
- (b)At $x = 1$ and $x = 3$
- (c)At $x = -1$ and $x = 1$
- (d)At $x = -1.5$ and $x = 1.5$

Answer
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From ISC 2024 Mathematics Paper 1, question 1(iv).