Mathematics - Continuity - Differentiability Question with Solution | TestHub

$f$is continuous everywhere but not differentiable exactly at one point in$\left(0,\infty \right)$

$f$is differentiable everywhere in$\left(0,\infty \right)$

$f$is not continuous exactly at two points in$\left(0,\infty \right)$

$f$is continuous everywhere but not differentiable exactly at two points in$\left(0,\infty \right)$