Gaokao Math Practice Question
10. 设函数 $f(x)=x^{3}-\frac{1}{x^{3}}$, 则 $f(x)(\quad)$
- A.是奇函数, 且在 $(0,+\infty)$ 单调递增
- B.是奇函数, 且在 $(0,+\infty)$ 单调递减
- C.是偶函数, 且在 $(0,+\infty)$ 单调递增
- D.是偶函数, 且在 $(0,+\infty)$ 单调递减
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