Which is not an even function ? `f(x) =sqrt(1+x+x^2)+sqrt(1-x+x^2)`

The function f(x)=sqrt(1+x+x^(2))-sqrt(1-x+x^(2)) is

Which of the following function is an even function? f(x)=sqrt(1+x^(3))-sqrt(1-x^(3))

The function f(x)=sqrt(1-sqrt(1-x^2))

The function f(x)=sqrt(1-sqrt(1-x^(2)))

Examine whether the following function are even or odd or neither even nor odd, where [ ] denotes greatest integer function. f(x)=sqrt(1+x+x^(2))-sqrt(1-x+x^(2))

Examine whether the following function are even or odd or neither even nor odd, where [ ] denotes greatest integer function. f(x)=sqrt(1+x+x^(2))-sqrt(1-x+x^(2))

Domain of function f(x)=sqrt(x-sqrt(1-x^(2)))

The domain of the function f(x)=sqrt(x-sqrt(1-x^2)) is

The range of the function f(x) = sqrt(2-x)+sqrt( 1+x)