The set of points where `f(x)=x/(1+|x|)` is differentiable is

The set of points where ,f(x)=x|x| is twice differentiable is

The set of all points where f(x)=2x|x| is differentiable

The set of points where , f(x) = x|x| is twice differentiable is

The set of points where , f(x) = x|x| is twice differentiable is

The set of points where , f(x) = x|x| is twice differentiable is

Let f : R to R be a function defined by f(x) = max. {x, x^(3)} . The set of all points where f(x) is NOT differentiable is

If f:R rarr R is defined by f(x)=max{x,x^(3)} .The set of all points where f(x) is not differentiable is

Let f : R rarr R be a function defined by f(x) = max {x,x^(3)} . The set of all points where f(x) is not differentiable is

The set of points where x^(2)|x| is thrice differentiable, is

The set of points where x^(2)|x| is thrice differentiable, is