单选题
当x→0时,下列哪一个无穷小是x的三阶无穷小。()
- A.<img src="https://timg.fentiku.com/javaimportItems/44851d922c6f4f98b3ddcbd1eb008310/images/ff17d.png"><br/>
- B.<img src="https://timg.fentiku.com/javaimportItems/44851d922c6f4f98b3ddcbd1eb008310/images/fff23.png"><br/>
- C.<img src="https://timg.fentiku.com/javaimportItems/44851d922c6f4f98b3ddcbd1eb008310/images/102114.png"><br/>
- D.<img src="https://timg.fentiku.com/javaimportItems/44851d922c6f4f98b3ddcbd1eb008310/images/103140.png"><br/>
正确答案:B