Suppose a continuous and differentiable density function $f$, defined on $[a,b]$. Is $f'$ continuous on $[a,b]$? What conditions are required to make this statement true?
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- Not necessarily. 2) Just tautological ones, basically.
– Apr 10 '18 at 15:12 -
Derivatives can be discontinuous – Apr 10 '18 at 15:14