1£®2x²£­5x£­3£¼0µÄÒ»¸ö±ØÒª²»³ä·ÖÌõ¼þÊÇ  £¨¡¡ £©

A£®£­ £¼x£¼3               B£®£­ £¼x£¼0              C£®£­3£¼x£¼         D£®£­1£¼x£¼6

2£®µ±x≠0ʱ£¬Óв»µÈʽ£¨   £©

A£®                                B£®

C£®           D£®

3£®ÊýÁÐ{ }µÄͨÏʽΪ ÔòÊýÁÐ{ }µÄÇ°nÏîºÍΪ(    )

A£®                                 B£®

C£®                         D£®

4£®ÒÑÖª·½³Ì + =1±íʾ½¹µãÔÚyÖáÉϵÄÍÖÔ²£¬ÔòmµÄÈ¡Öµ·¶Î§ÊÇ £¨   £©