Judge the odd and even numbers of the following functions, and explain the reasons; (1) f (x) = the cube of X / 1 (2) g (x) = the square of X, X belongs to (- 2,2] (3) the square of y = 2x-5

Judge the odd and even numbers of the following functions, and explain the reasons; (1) f (x) = the cube of X / 1 (2) g (x) = the square of X, X belongs to (- 2,2] (3) the square of y = 2x-5

1) F (x) = 1 / x ^ 3, f (- x) = - 1 / x ^ 3 = - f (x), is an odd function
2) The domain is not symmetric, - 2 is not on the domain, but 2 is on the domain, so it is not odd or even
3) Y = 2x ^ 2-5, y (- x) = y (x), even function