If `y= sqrt(x^2+x^3)` then the set of all points where the derivative exist is

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

If f : R to R be a function defined by f (x) = max {x,x^(3)}, find the set of all points where f (x) is not differentiable.

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

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

What is the set of all solutions to the equation sqrt(x+2)=-x ?