(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the points where the function given by

is not differentiable.

3. The attempt at a solution

I got the doubtful points as +-1, 2

How do I check the differentiability now? The mod. function is confusing me a bit.

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# Find the points where the function is not differentiable

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