1. ## Lhd=rhd

Is there is any example of function in which LEFT HAND DERIVATIVE =RIGHT HAND DERIVATIVE but still the function is not differentiable
is it possible in discontinuous function for example in floor function LHD=RHD =(0) but still floor x is not differentiable at integer.

Is there is any example of function in which LEFT HAND DERIVATIVE =RIGHT HAND DERIVATIVE but still the function is not differentiable
is it possible in discontinuous function for example in floor function LHD=RHD =(0) but still floor x is not differentiable at integer.
What about $\displaystyle f(x) = \frac{x^2 - 1}{x+1}$, for example?

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### what is the full form of lhd and rhd in maths

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