È˽̰æ¸ßÖÐÊýѧ±ØÐÞËĵÚ5½²£ºÈý½Çº¯ÊýͼÏñ±ä»»£¨½Ìʦ°æ£©

¦ÐC£®

3[´ð°¸] C

5¦ÐD£® 3

¦Ð4¦Ð¦Ð

x£­£«? [½âÎö] µ±¦Õ£½Ê±£¬µÃy£½cos??33?3£½cos(¦Ð£«x)£½£­cosx£¬ËùÒÔͼÏó¹ØÓÚyÖá¶Ô³Æ£® ¶þ¡¢Ìî¿ÕÌâ

n¦Ð

5£®ÒÑÖªf(n)£½cos£¬n¡ÊN*£¬Ôòf(1)£«f(2)£«f(3)£«¡­£«f(100)£½________.

4[´ð°¸] £­1

n¦Ð

[½âÎö] Òòf(n)£½cosµÄÖÜÆÚT£½8£¬ÇÒf(1)£«f(2)£«¡­£«f(8)£½0.

4

¦Ð¦Ð3¦Ð

ËùÒÔf(1)£«f(2)£«¡­£«f(100)£½f(1)£«f(2)£«f(3)£«f(4)£½cos£«cos£«cos£«cos¦Ð£½£­1.

424

¦Ð7¦Ð

6£®ÒÑÖªº¯Êýy£½Asin(¦Øx£«¦Õ)£¬ÔÚͬһÖÜÆÚÄÚµ±x£½Ê±£¬ymax£½2£»µ±x£½Ê±£¬ymin£½£­2£¬ÄÇ

1212ôº¯ÊýµÄ½âÎöʽΪ________£®

¦Ð

2x£«? [´ð°¸] y£½2sin?3??

T7¦Ð¦Ð¦Ð

[½âÎö] ¡ß£½£­£½£¬¡àT£½¦Ð£¬¦Ø£½2£¬

212122¦Ð?ÓÖA£½2£¬¡ày£½2sin(2x£«¦Õ)¹ýµã??12£¬2?£¬ ¦Ð¦Ð

£«¦Õ?£½1£¬¡à¦Õ£½£«2k¦Ð(k¡ÊZ)£® ¡àsin??6?3Èý¡¢½â´ðÌâ

¦Ð

7£®Çóº¯Êýy£½2cos(£­4x)µÄµ¥µ÷Çø¼ä¡¢×î´óÖµ¼°È¡µÃ×î´óֵʱxµÄ¼¯ºÏ£®

6¦Ð¦Ð

[½âÎö] y£½2cos(£­4x)£½2cos(4x£­)£®

66¦Ð

Á¦Ð£«2k¦Ð¡Ü4x£­¡Ü2k¦Ð£¬k¡ÊZ£¬

65¦Ðk¦Ð¦Ðk¦Ð

µÃ£­£«¡Üx¡Ü£«£¬k¡ÊZ.

242242¦Ð

Áî2k¦Ð¡Ü4x£­¡Ü2k¦Ð£«¦Ð£¬k¡ÊZ£¬

6k¦Ð¦Ðk¦Ð7¦Ð

µÃ£«¡Üx¡Ü£«£¬k¡ÊZ. 224224

k¦Ð5¦Ðk¦Ð¦Ð

¡à¸Ãº¯ÊýµÄµ¥µ÷ÔöÇø¼äÊÇ[£­£¬£«](k¡ÊZ)£¬

224224k¦Ð¦Ðk¦Ð7¦Ð

µ¥µ÷¼õÇø¼äÊÇ[£«£¬£«](k¡ÊZ)£®

224224

21

¦Ð

µ±cos(4x£­)£½1ʱ£¬ymax£½2.

6¦Ð

´Ëʱ4x£­£½2k¦Ð£¬k¡ÊZ£¬

6k¦Ð¦Ð

¡àx£½£«£¬k¡ÊZ.

224

k¦Ð¦Ð

¼´º¯ÊýÈ¡µÃ×î´óֵʱxµÄ¼¯ºÏÊÇ{x|x£½£«£¬k¡ÊZ}£¬ÇÒ×î´óֵΪ2.

2248£®ÅжÏÏÂÁк¯ÊýµÄÆæÅ¼ÐÔ£¬²¢ÇóËüÃǵÄ×îСÕýÖÜÆÚ£® (1)y£½3cos2x£» 33¦Ð

(2)y£½cos(x£«)£®

42[½âÎö] Áîf(x)£½3cos2x£¬

¡àf(£­x)£½3cos(£­2x)£½3cos2x£½f(x)£¬ ¡àº¯Êýf(x)Ϊżº¯Êý£® ×îСÕýÖÜÆÚT£½¦Ð.

33¦Ð3

(2)Áîf(x)£½cos(x£«)£½sinx.

42433

¡àf(£­x)£½sin(£­x)£½£­sinx£½£­f(x)£¬

4433¦Ð

¡àº¯Êýy£½cos(x£«)ÊÇÆæº¯Êý.

422¦Ð8¦Ð

×îСÖÜÆÚT£½£½. 334

¦Ð¦Ð

kx£­?£¬g(x)£½bcos?2kx£­?(a>0£¬b>0£¬k>0)£¬ÈôËüÃǵÄ×îСÕýÖÜÆÚÖ®ºÍΪ9£®É躯Êýf(x)£½asin?3?6???¦Ð??¦Ð??¦Ð?3¦Ð?¦Ð?£­1£¬ÇóÕâÁ½¸öº¯ÊýµÄ½âÎöʽ£® £¬ÇÒf?£½g£¬f£½£­3g?2??2??4??4?2

[½âÎö] º¯Êýf(x)µÄÖÜÆÚT1£½

2¦Ð¦Ð

£¬º¯Êýg(x)µÄÖÜÆÚT2£½£¬ kk

3¦Ð2¦Ð¦Ð3¦Ð

ÓÉÒÑÖªT1£«T2£½£¬¡à£«£½£¬¡àk£½2.

2kk2¦Ð??¦Ð?

ÓÖf??2?£½g?2?£¬ÔòÓÐ ¦Ð?2¦Ð£­¦Ð?. ¦Ð£­?£½b¡¤a¡¤sin?cos6??3??¡à

33

a£½b£¬¼´a£½b 22

¢Ù

¦Ð??¦Ð?£­1£¬ÔòÓÐ ÓÖf?£½£­3g?4??4?¦Ð5¦Ða¡¤sin£½£­3b¡¤cos£­1.

66

22

13

¼´a£½b£­1£¬ 22ÓÉ¢Ù¢Ú½âµÃa£½b£½1.

¦Ð¦Ð2x£­?£¬g(x)£½cos?4x£­?. ËùÒÔf(x)£½sin?3?6???

¢Ú

23

ÁªÏµ¿Í·þ£º779662525#qq.com(#Ìæ»»Îª@)