¸ß¿¼ÊýѧһÂÖ¸´Ï° µÚ¶þÕ º¯Êý¸ÅÄîÓë»ù±¾³õµÈº¯ÊýI 2.7 º¯ÊýµÄͼÏó

´ð°¸ D

½âÎö µ±x¡Ý1ʱ£¬f(x)£½e£½x£¬ÆäͼÏóΪһÌõÖ±Ïߣ»µ±0

ln x£­ln x1

£½.º¯Êýyx£½f(x£«1)µÄͼÏóΪº¯Êýy£½f(x)ͼÏóÏò×óÆ½ÒÆ1¸öµ¥Î»³¤¶ÈºóµÃµ½µÄ£®¹ÊÑ¡D.

4£®(½Ì²Ä¸Ä±à)µãP´ÓµãO³ö·¢£¬°´ÄæÊ±Õë·½ÏòÑØÖܳ¤ÎªlµÄͼÐÎÔ˶¯Ò»ÖÜ£¬O£¬PÁ½µãÁ¬ÏߵľàÀëyÓëµãP×ß¹ýµÄ·³ÌxµÄº¯Êý¹ØÏµÈçͼ£¬ÄÇôµãPËù×ßµÄͼÐÎÊÇ( )

5

´ð°¸ C

??log2x5£®ÒÑÖªº¯Êýf(x)£½?x?2 ?

x£¾0£¬x¡Ü0£¬

ÇÒ¹ØÓÚxµÄ·½³Ìf(x)£­a£½0ÓÐÁ½¸öʵ¸ù£¬ÔòʵÊýaµÄ·¶Î§ÊÇ________£® ´ð°¸ (0,1]

½âÎö µ±x¡Ü0ʱ£¬0£¼2¡Ü1£¬ËùÒÔÓÉͼÏó¿É֪Ҫʹ·½³Ìf(x)£­a£½0ÓÐÁ½¸öʵ¸ù£¬¼´º¯Êýy£½f(x)Óëy£½aµÄͼÏóÓÐÁ½¸ö½»µã£¬ËùÒÔÓÉͼÏó¿ÉÖª0£¼a¡Ü1.

x 6

ÌâÐÍÒ» ×÷º¯ÊýµÄͼ Àý1 ×÷³öÏÂÁк¯ÊýµÄͼÏó£º (1)y£½|lg x|£» (2)y£½

x£«2

£» x£­1

2

(3)y£½x£­2|x|£­1.

??lg x£¬x¡Ý1£¬

½â (1)y£½|lg x|£½?

??£­lg x£¬0

×÷³öͼÏóÈçͼ1.

(2)Òòy£½1£«¼´µÃy£½

33

£¬ÏÈ×÷³öy£½µÄͼÏ󣬽«ÆäͼÏóÏòÓÒÆ½ÒÆ1¸öµ¥Î»£¬ÔÙÏòÉÏÆ½ÒÆ1¸öµ¥Î»£¬x£­1xx£«2

µÄͼÏó£¬Èçͼ2. x£­1

7

??x£­2x£­1 (3)y£½?2

?x£«2x£­1 ?

2

x¡Ý0£¬x<0.

ͼÏóÈçͼ3.

ÒýÉê̽¾¿

×÷º¯Êýy£½|x£­2x£­1|µÄͼÏó£®

2

?x2£­2x£­1 x¡Ý1£«2»òx¡Ü1£­2½â y£½?2

?£­x£«2x£«1 1£­2

ÈçÏÂͼ

˼άÉý»ª (1)³£¼ûµÄ¼¸ÖÖº¯ÊýͼÏóÈç¶þ´Îº¯Êý¡¢·´±ÈÀýº¯Êý¡¢Ö¸Êýº¯Êý¡¢¶ÔÊýº¯Êý¡¢Ãݺ¯Êý¡¢ÐÎÈçy£½x£«(m>0)µÄº¯ÊýÊÇͼÏó±ä»»µÄ»ù´¡£»

(2)ÕÆÎÕÆ½ÒƱ任¡¢ÉìËõ±ä»»¡¢¶Ô³Æ±ä»»¹æÂÉ£¬¿ÉÒÔ°ïÖúÎÒÃǼò»¯×÷ͼ¹ý³Ì£®

mx 8

ÁªÏµ¿Í·þ£º779662525#qq.com(#Ìæ»»Îª@)