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Function/Not differentiable/Argument in modulus/Exercise
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Function
Give an example of a continuous, not differentiable function
f
:
R
⟶
R
{\displaystyle f\colon \mathbb {R} \longrightarrow \mathbb {R} }
fulfilling the property that the function
x
↦
f
(
|
x
|
)
{\displaystyle {}x\mapsto f{\left(\vert {x}\vert \right)}}
is differentiable.
Create a solution