ÒÑÖªº¯Êýf(x)£½x2£­(a£«2)x£«alnx£®ÆäÖг£Êýa£¾0£¬

(¢ñ)µ±a£¾2ʱ£¬Çóº¯Êýf(x)µÄµ¥µ÷µÝÔöÇø¼ä£»

(¢ò)µ±a£½4ʱ£¬¸ø³öÁ½ÀàÖ±Ïߣº6x£«y£«m£½0Óë3x£­y£«n£½0£¬ÆäÖÐm£¬nΪ³£Êý£¬ÅжÏÕâÁ½ÀàÖ±ÏßÖÐÊÇ·ñ´æÔÚy£½f(x)µÄÇÐÏߣ¬Èô´æÔÚ£¬Çó³öÏàÓ¦µÄm»ònµÄÖµ£¬Èô²»´æÔÚ£¬ËµÃ÷ÀíÓÉ£®

(¢ó)É趨ÒåÔÚDÉϺ¯Êýy£½h(x)ÔÚµãP(x0£¬h(x0))´¦µÄÇÐÏß·½³ÌΪl£ºy£½g(x)£¬µ±x¡Ùx0ʱ£¬ÈôÔÚDÄÚºã³ÉÁ¢£¬Ôò³ÆµãPΪº¯Êýy£½h(x)µÄ¡°Àà¶Ô³Æµã¡±£®

Áîa£½4£¬ÊÔÎÊy£½f(x)ÊÇ·ñ´æÔÚ¡°Àà¶Ô³Æµã¡±£¬Èô´æÔÚ£¬ÇëÖÁÉÙÇó³öÒ»¸ö¡°Àà¶Ô³Æµã¡±µÄºá×ø±ê£¬Èô²»´æÔÚ£¬ËµÃ÷ÀíÓÉ£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

¶Ô¶¨ÒåÔÚÇø¼äl£¬Éϵĺ¯Êýf(x)£¬Èô´æÔÚ¿ªÇø¼ä(a£¬b)IºÍ³£ÊýC£¬Ê¹µÃ¶ÔÈÎÒâµÄx¡Ê(a£¬b)¶¼ÓУ­C£¼f(x)£¼C£¬ÇÒ¶ÔÈÎÒâµÄx(a£¬b)¶¼ÓÐ|f(x)|£½Cºã³ÉÁ¢£¬Ôò³Æº¯Êýf(x)ΪÇø¼ä¢ñÉϵġ°ZÐÍ¡±º¯Êý£®

(¢ñ)ÇóÖ¤£ºº¯Êýf(x)£½|x£­3|£­|x£­1|ÊÇRÉϵġ°ZÐÍ¡±º¯Êý£»

(¢ò)Éèf(x)ÊÇ(¢ñ)Öеġ°ZÐÍ¡±º¯Êý£¬Èô²»µÈʽ|t|£½|t£«1|¡Ýf(x)¶ÔÈÎÒâµÄx¡ÊRºã³ÉÁ¢£¬ÇóʵÊýtµÄÈ¡Öµ·¶Î§£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

ÔÚ¡÷ABCÖУ¬½ÇA£¬B£¬CµÄ¶Ô±ß·Ö±ðΪa£¬b£¬cÇÒa£«c£½10£¬C£½2A£¬cosA£½£®

Çó£º(¢ñ)µÄÖµ£»

(¢ò)bµÄÖµ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

ÒÑÖªº¯ÊýÈôx1x2¡ÊR£¬x1¡Ùx2£¬Ê¹µÃf(x1)£½f(x2)³ÉÁ¢£¬ÔòʵÊýaµÄÈ¡Öµ·¶Î§ÊÇ

[¡¡¡¡]

A£®

(£­2£¬2)

B£®

(£­¡Þ£¬£­2)¡È(2£¬£«¡Þ)

C£®

(£­¡Þ£¬2)

D£®

(£­¡Þ£¬2]

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

ÒÑÖªº¯Êýf(x)£½cos2x£­sinxcosx£«1£®

(¢ñ)Çóº¯Êýf(x)µÄµ¥µ÷µÝÔöÇø¼ä£»

(¢ò)Èôf()£½£¬¡Ê(£¬)£¬Çósin2µÄÖµ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

ÔÚÇø¼ä[0£¬¦Ð]ÄÚËæ»úÈ¡Á½¸öÊý·Ö±ð¼ÇΪa¡¢b£¬ÔòʹµÃº¯Êýf(x)£½x2£«2ax£«b2£«¦ÐÓÐÁãµãµÄ¸ÅÂÊΪ

[¡¡¡¡]

A£®

B£®

C£®

D£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

Èôx£¬yÂú×ãÌõ¼þ£¬ÔòÄ¿±êº¯Êýz£½x£«2y£«1µÄ×î´óÖµÊÇ________£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

ÒÑÖªº¯Êýf(x)£½x2£­5x£«4£¬Ôò²»µÈʽ×é±íʾµÄƽÃæÇøÓòΪ

[¡¡¡¡]

A£®

B£®

C£®

D£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¿Î±ê×ۺϰæ רÌ⸴ϰ ÌâÐÍ£º

½«º¯ÊýµÄͼÏó°´ÏòÁ¿a£½(£¬2)ƽÒƺóËùµÃͼÏóµÄº¯ÊýΪ

[¡¡¡¡]

A£®

B£®

C£®

D£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸