Ò»¡¢Ñ¡ÔñÌâ

1£®Èôa£¬b∈R£¬ÔòÏÂÃæËĸöʽ×ÓÖкã³ÉÁ¢µÄÊÇ                                                (¡¡¡¡)

A£®lg (1£«a²)>0                                      B£®a²£«b²≥2(a£­b£­1)

C£®a²£«3ab>2b²                                      D.<

½âÎö¡¡ÔÚBÖУ¬¡ßa²£«b²£­2(a£­b£­1)£½(a²£­2a£«1)£«(b²£«2b£«1)£½(a£­1)²£«(b£«1)²≥0£¬

∴a²£«b²≥2(a£­b£­1)ºã³ÉÁ¢£®

´ð°¸¡¡B

2£®ÒÑÖªm>1£¬a£½£­£¬b£½£­£¬ÔòÒÔϽáÂÛÕýÈ·µÄÊÇ(¡¡¡¡)

A£®a>b                                                          B£®a<b

C£®a£½b                                                         D£®a£¬b´óС²»¶¨

½âÎö¡¡¡ßa£½£­£½£¬