Ò»¡¢Ñ¡ÔñÌâ
1£®ÏÂÁк¯ÊýÖУ¬¼ÈÊÇżº¯ÊýÓÖÔÚÇø¼ä£¨£­∞£¬0£©Éϵ¥µ÷µÝÔöµÄÊÇ£¨ £©
A£®f£¨x£©£½ B£®f£¨x£©£½x2£«1
C£®f£¨x£©£½x3 D£®f£¨x£©£½2£­x
2£®¹ýÔ­µã×÷ÇúÏß µÄÇÐÏߣ¬ÔòÇÐÏßбÂÊΪ £¨ £©
A£® B£® C£® D£®
3£®º¯Êý µÄͼÏóÊÇ£¨ £©