Prove that the greatest integer function defined by ๐(๐ฅ) = [๐ฅ], 0 < ๐ฅ < 2 is not differentiable at ๐ฅ = 1
This question is exactly same as Ex 5.2, 10 of Chapter 5 Class 12 Continuity and Differentiability in the NCERT Book.
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