Exercise 11

Let \(f : \mathbb{R} \to \mathbb{R}\) be defined as \(f(x) = x^4\). Choose the correct answer.
(A) \(f\) is one-one onto
(B) \(f\) is many-one onto
(C) \(f\) is one-one but not onto
(D) \(f\) is neither one-one nor onto