The graph of $f (x)$ is given in the figure. $| f (x) |$ is non differential at $x = ($ in the interval $(- 1, 3)) :$

3 & 2

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1 & 2

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0 & 2

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None of these

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Solution

The correct option is B $1 & 2$
Graph $| f (x) |$ is
Since graph has sharp edge at $x = 2$ and $x = 1$
$∴$ Function is non differential at $x = 2$ and $1$

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