¸ßÖÐÊýѧ2.4µÈ±ÈÊýÁеÚ1¿ÎʱµÈ±ÈÊýÁеĸÅÄîÓëͨÏʽÁ·Ï°ÐÂÈ˽ÌA°æ±ØÐÞ5

µÚ1¿Îʱ µÈ±ÈÊýÁеĸÅÄîÓëͨÏʽ

A¼¶ »ù´¡¹®¹Ì

Ò»¡¢Ñ¡ÔñÌâ

1£®ÏÂÁÐÊýÁÐΪµÈ±ÈÊýÁеÄÊÇ( ) A£®0£¬0£¬0£¬0£¬¡­ B£®2£¬4£¬6£¬8£¬¡­

C£®q£­1£¬(q£­1)£¬(q£­1)£¬(q£­1)£¬¡­ 1111

D.£¬2£¬3£¬4£¬¡­

2

3

4

2

2

2

2

aaaa½âÎö£ºAÑ¡ÏîÖУ¬ÓÉÓڵȱÈÊýÁÐÖеĸ÷Ïî¶¼²»Îª0£¬ËùÒÔ¸ÃÊýÁв»ÊǵȱÈÊýÁУ»BÑ¡Ïî46

ÖУ¬2¡Ù2£¬ËùÒÔ¸ÃÊýÁв»ÊǵȱÈÊýÁУ»CÑ¡ÏîÖУ¬µ±q£½1ʱ£¬ÊýÁÐΪ0£¬0£¬0£¬¡­£¬²»ÊÇ

2411

µÈ±ÈÊýÁУ»DÑ¡ÏîÖеÄÊýÁÐÊÇÊ×ÏîΪ£¬¹«±ÈΪµÄµÈ±ÈÊýÁУ¬¹ÊÑ¡D.

2

2

aa´ð°¸£ºD

2£®ÔڵȱÈÊýÁÐ{an}ÖУ¬a2 019£½8a2 016£¬Ôò¹«±ÈqµÄֵΪ( ) A£®2 B£®3 C£®4 D£®8 ½âÎö£ºa2 019£½8a2 016£½a2 016¡¤q£¬ ËùÒÔq£½8£¬ËùÒÔq£½2. ´ð°¸£ºA

3£®ÒÑÖªµÈ±ÈÊýÁÐ{an}µÄǰÈýÏîÒÀ´ÎΪa£­1£¬a£«1£¬a£«4£¬Ôòan£½( )

3

3

?3?A£®4¡Á?? ?2??2?C£®4¡Á?? ?3?

2

n?3?B£®4¡Á???2??2?D£®4¡Á???3?

n£­1

n£­1

n£­1

n

½âÎö£ºÓÉÌâÒâµÃ(a£«1)£½(a£­1)(a£«4)£¬½âµÃa£½5£¬ 3?3?¹Êa1£½4£¬a2£½6£¬ËùÒÔq£½£¬an£½4¡Á??2?2?´ð°¸£ºB

2a1£«a2*

4£®ÔÚÊýÁÐ{an}ÖУ¬¶ÔÈÎÒân¡ÊN£¬¶¼ÓÐan£«1£­2an£½0£¬ÔòµÄֵΪ( )

2a3£«a4

.

1A. 41B. 31C. 2

D£®1

½âÎö£ºa2£½2a1£¬a3£½2a2£½4a1£¬a4£½8a1£¬ 2a1£«a24a11ËùÒÔ£½£½. 2a3£«a416a14´ð°¸£ºA

5£®ÒÑÖªÊýÁÐ{an}Âú×ãlog3an£«1£½log3an£«1(n¡ÊN)£¬ÇÒa2£«a4£«a6£½9£¬Ôòlog1(a5£«a7£«

3

*

a9)µÄÖµÊÇ( )

A£®£­5

1B£®£­

5

C£®5

1D. 5

½âÎö£ºÒòΪlog3an£«1£½log3an£«1£¬ËùÒÔan£«1£½3an£¬ ÓÖan¡Ù0.

ËùÒÔÊýÁÐ{an}ÊÇÒÔ3Ϊ¹«±ÈµÄµÈ±ÈÊýÁУ® ËùÒÔa2£«a4£«a6£½a2(1£«q£«q)£½9.

ËùÒÔa5£«a7£«a9£½a5(1£«q£«q)£½a2q¡¤(1£«q£«q)£½3. ËùÒÔlog13£½£­5.

35

2

4

3

2

4

5

2

4

´ð°¸£ºA ¶þ¡¢Ìî¿ÕÌâ

6£®µÈ±ÈÊýÁÐ{an}ÖУ¬a4£½2£¬a5£½4£¬ÔòÊýÁÐ{lg an}µÄͨÏʽΪ____________£®

a41

½âÎö£ºÒòΪa5£½a4q£¬ËùÒÔq£½2£¬ËùÒÔa1£½3£½£¬

q4

1n£­1n£­3

ËùÒÔan£½¡¤2£½2£¬ËùÒÔlg an£½(n£­3)lg 2.

4´ð°¸£ºlg an£½(n£­3)lg 2

7£®ÔÚ¸÷Ïî¾ùΪÕýÊýµÄµÈ±ÈÊýÁÐ{an}ÖУ¬Èôa2£½1£¬a8£½a6£«2a4£¬Ôòa6µÄÖµÊÇ________£® ½âÎö£ºÒòΪa8£½a2q£¬a6£½a2q£¬a4£½a2q£¬ËùÒÔÓÉa8£½a6£«2a4µÃa2q£½a2q£«2a2q£¬ÏûÈ¥

6

4

2

6

4

2

a2q2£¬µÃµ½¹ØÓÚq2µÄÒ»Ôª¶þ´Î·½³Ì(q2)2£­q2£­2£½0£¬½âµÃq2£½2£¬q2£½£­1(ÉáÈ¥)£¬ËùÒÔa6£½a2q4£½1¡Á22£½4.

´ð°¸£º4

8£®ÒÑÖªÊýÁУ­1£¬a1£¬a2£¬£­4³ÉµÈ²îÊýÁУ¬£­1£¬b1£¬b2£¬b3£¬£­4³ÉµÈ±ÈÊýÁУ¬ÔòµÄֵΪ________£®

½âÎö£ºÒòΪ£­1£¬a1£¬a2£¬£­4³ÉµÈ²îÊýÁУ¬É蹫²îΪd£¬

a2£­a1

b2

1

Ôòa2£­a1£½d£½[(£­4)£­(£­1)]£½£­1£¬

3ÒòΪ£­1£¬b1£¬b2£¬b3£¬£­4³ÉµÈ±ÈÊýÁУ¬ ËùÒÔb2£½(£­1)¡Á(£­4)£½4£¬ ËùÒÔb2£½¡À2.

ÈôÉ蹫±ÈΪq£¬Ôòb2£½(£­1)q£¬ ËùÒÔb2£¼0£¬ËùÒÔb2£½£­2£¬ ËùÒÔ

2

2

a2£­a1£­11

£½£½. b2£­22

1´ð°¸£º 2Èý¡¢½â´ðÌâ

9£®ÔڵȱÈÊýÁÐ{an}ÖУ® (1)ÒÑÖªa1£½3£¬q£½£­2£¬Çóa6£» (2)ÒÑÖªa3£½20£¬a6£½160£¬Çóan. ½â£º(1)ÓɵȱÈÊýÁеÄͨÏʽµÃ£¬

a6£½3¡Á(£­2)6£­1£½£­96.

(2)ÉèµÈ±ÈÊýÁеĹ«±ÈΪq£¬

?a1q£½20£¬?ÄÇô?5

?aq£½160£¬?1??q£½2£¬½âµÃ?

?a1£½5.?

2

ËùÒÔan£½a1qn£­1

£½5¡Á2

n£­1

.

810£®ÔÚ¸÷Ïî¾ùΪ¸ºÊýµÄÊýÁÐ{an}ÖУ¬ÒÑÖª2an£½3an£«1£¬ÇÒa2¡¤a5£½.

27(1)ÇóÖ¤£º{an}ÊǵȱÈÊýÁУ¬²¢Çó³öÆäͨÏ

16

(2)ÊÔÎÊ£­ÊÇÕâ¸öµÈ±ÈÊýÁÐÖеÄÏîÂð£¿Èç¹ûÊÇ£¬Ö¸Ã÷Êǵڼ¸ÏÈç¹û²»ÊÇ£¬Çë˵Ã÷Àí

81ÓÉ£®

(1)Ö¤Ã÷£ºÒòΪ2an£½3an£«1£¬ ËùÒÔ

an£«12

£½. an3

ÓÖÒòΪÊýÁÐ{an}µÄ¸÷Ïî¾ùΪ¸ºÊý£¬ ËùÒÔa1¡Ù0£¬

2

ËùÒÔÊýÁÐ{an}ÊÇÒÔΪ¹«±ÈµÄµÈ±ÈÊýÁУ®

3

ËùÒÔan£½a1¡¤qn£­1

?2?£½a1¡¤???3?

n£­1

.

?2?ËùÒÔa2£½a1¡¤???3??2?a5£½a1¡¤???3?

5£­1

2£­1

2

£½a1£¬ 3

16

£½a1£¬ 81

2168

ÓÖÒòΪa2¡¤a5£½a1¡¤a1£½£¬

3812792

ËùÒÔa1£½.

4

3

ÓÖÒòΪa1<0£¬ËùÒÔa1£½£­.

2

?3??2?ËùÒÔan£½?£­?¡Á???2??3?

n£­1

?2?£½£­???3?

n£­2

(n¡ÊN)£®

*

?2?(2)½â£ºÁîan£½£­???3?

n£­2

16£½£­£¬

81

*

Ôòn£­2£½4£¬n£½6¡ÊN£¬

16

ËùÒÔ£­ÊÇÕâ¸öµÈ±ÈÊýÁÐÖеÄÏÇÒÊǵÚ6Ï

81

B¼¶ ÄÜÁ¦ÌáÉý

1£®ÔÚÊýÁÐ{an}ÖУ¬ÒÑÖªa1£½1£¬an£«1£½2an£«1£¬Ôòan£½( ) A£®2£­1

nB£®2

n£­1

£­1 C£®2n£­1 D£®2(n£­1)

½âÎö£ºµÈʽÁ½±ßͬʱ¼Ó1£¬µÃan£«1£«1£½2(an£«1)£¬ËùÒÔÊýÁÐ{an£«1}ÊÇÒÔa1£«1£½2ΪÊ×Ïq£½2Ϊ¹«±ÈµÄµÈ±ÈÊýÁУ¬ËùÒÔan£«1£½2¡Á2

´ð°¸£ºA

2£®ÒÑÖªµÈ±ÈÊýÁÐ{an}ΪµÝÔöÊýÁУ¬a1£½£­2£¬ÇÒ3(an£«an£«2)£½ 10an£«1£¬Ôò¹«±Èq£½________£®

½âÎö£ºÒòΪµÈ±ÈÊýÁÐ{an}ΪµÝÔöÊýÁУ¬ÇÒa1£½£­2<0£¬ ËùÒÔ0

ÓÖÒòΪ3(an£«an£«2)£½10an£«1£¬Á½±ßͬ³ýan£¬ ¿ÉµÃ3(1£«q)£½10q£¬

12

¼´3q£­10q£«3£½0£¬½âµÃq£½3»òq£½.

31

¶ø0

3

2

n£­1

£½2£¬ËùÒÔan£½2£­1.

nn1´ð°¸£º 3

3£®Éè¹ØÓÚxµÄ¶þ´Î·½³Ìanx£­an£«1x£«1£½0(n£½1£¬2£¬3£¬¡­)ÓÐÁ½¸ù¦ÁºÍ¦Â£¬ÇÒÂú×ã6¦Á£­2¦Á¦Â£«6¦Â£½3.

(1)ÊÔÓÃan±íʾan£«1£»

?2?

?a£­(2)ÇóÖ¤£ºn?ÊǵȱÈÊýÁУ»

3??

2

7

(3)µ±a1£½Ê±£¬ÇóÊýÁÐ{an}µÄͨÏʽ¼°ÏîµÄ×î´óÖµ£®

6(1)½â£º¸ù¾Ý¸ùÓëϵÊýµÄ¹ØÏµ£¬

??µÃ?1

¦Á¦Â£½.??a¦Á£«¦Â£½

nan£«1

£¬an

´úÈëÌâÉèÌõ¼þ6(¦Á£«¦Â)£­2¦Á¦Â£½3£¬ µÃ

6an£«12

£­£½3.

anan11

ËùÒÔan£«1£½an£«. 23

11

(2)Ö¤Ã÷£ºÒòΪan£«1£½an£«£¬

232?21?

ËùÒÔan£«1£­£½?an£­?.

3?32?

22222

Èôan£½£¬Ôò·½³Ìanx£­an£«1x£«1£½0¿É»¯Îªx£­x£«1£½0£¬

333¼´2x£­2x£«3£½0.

´Ëʱ¦¤£½(£­2)£­4¡Á2¡Á3<0£¬ 22

ËùÒÔan¡Ù£¬¼´an£­¡Ù0.

33

?2?1

ËùÒÔÊýÁÐ?an£­?ÊÇÒÔΪ¹«±ÈµÄµÈ±ÈÊýÁУ®

3?2?

2

2

721

(3)½â£ºµ±a1£½Ê±£¬a1£­£½£¬

632

?2?11

ËùÒÔÊýÁÐ?an£­?ÊÇÒÔÊ×ÏîΪ£¬¹«±ÈΪµÄµÈ±ÈÊýÁУ®

3?22?

21?1?ËùÒÔan£­£½¡Á??32?2?

n£­1

?1?£½??£¬ ?2?

n

ÁªÏµ¿Í·þ£º779662525#qq.com(#Ìæ»»Îª@) ËÕICP±¸20003344ºÅ-4