2019-2020ѧÄê¸ßÒ»ÊýѧÉÏѧÆÚÆÚÄ©ÊÔ¾í
Ò»¡¢Ñ¡ÔñÌâ
1£®ÒÑÖªµãA,B,C,D¾ùÔÚÇòOÉÏ£¬AB?BC?3,AC?3£¬ÈôÈýÀâ׶D?ABCÌå»ýµÄ×î´óֵΪ
33£¬ÔòÇòOµÄÌå»ýΪ 4A.
32? 3B.16?
C.32?
D.
16? 32£®ÒÑÖªº¯Êýy?f?x?ÔÚÇø¼ä???,0?ÄÚµ¥µ÷µÝÔö£¬ÇÒf??x??f?x?£¬Èôa?f?log13?£¬
????2?1?b?f2?1.2£¬c?f??£¬Ôòa,b,cµÄ´óС¹ØϵΪ£¨ £©
?2???A£®a?c?b B£®b?c?a C£®b?a?c
D£®a?b?c
3£®ÉèÊýÁÐ?an?µÄÇ°nÏîºÍΪSn£¬ÇÒa1?1 an?ºÍÊÇ£¨ £© A£®290
B£®
?1?Sn?2(n?1)(n?N?)£¬ÔòÊýÁÐ??µÄÇ°10ÏîµÄn?Sn?3n?10 11rrrrrrrr4£®ÒÑÖªÏòÁ¿a£¬bÂú×ãa?3£¬b?4£¬a?b?14£¬Ôòa?b=£¨ £©
A£®3
9 20C£®
5 11D£®
rr£¬3£¬ÏòÁ¿b?5£®ÒÑÖªÏòÁ¿a?1B£®5 C£®6 D£®7
???rr3£¬x£¬ÈôÏòÁ¿bÔÚÏòÁ¿a·½ÏòÉϵÄͶӰΪ?3£¬ÔòʵÊýxµÈÓÚ
?£¨ £© A£®3
B£®2
C£®?2
D£®?3
6£®ÒÑÖªa,b?R£¬Ôò¡°ab?0¡±ÊÇ¡°A£®³ä·Ö·Ç±ØÒªÌõ¼þ C£®³äÒªÌõ¼þ
7£®ÒÑÖªf?x??1?x£¬µ±A£®2sin?
ba??2¡±µÄ£¨ £© abB£®±ØÒª·Ç³ä·ÖÌõ¼þ D£®¼È·Ç³ä·ÖÒ²·Ç±ØÒªÌõ¼þ
?4????2ʱ£¬f?sin2???f??sin??2????µÄֵΪ£¨ £©
C£®?2sin?
2B£®2cos? D£®?2cos?
8£®ÈôʵÊýaÂú×ãa2?a?0,Ôò?a,a,aµÄ´óС¹ØϵÊÇ£º A.?a?a?a2
B.a??a?a2
C.a2??a?a
D.a?a2??a
AC?BC?2,PA?22£¬Ôò¸ÃÈýÀâ׶Íâ½ÓÇòµÄ9£®ÈýÀâ׶P?ABC£¬PA?ƽÃæABC £¬AC?BC£¬±íÃæ»ýΪ£¨ £© A.4? 10£®ÒÑÖªA£®1 11£®sinB.8? £¬Ôò
B£®3
C.16?
µÄÖµÊÇ£¨ £©
C£®
D£® D.64¦Ð
4?5??4?costan??36?3?? £½( )£® ?A£®£33 4B£®33 4 B£®Èô
C£®£3 4
D£®
3 412£®ÈôA£®ÈôC£®Èô
ÊÇ»¥²»ÏàͬµÄ¿Õ¼äÖ±Ïߣ¬
£¬Ôò£¬Ôò
2ÊDz»ÖغϵÄƽÃ棬ÏÂÁÐÃüÌâÕýÈ·µÄÊÇ £¨ £©
£¬Ôò£¬Ôò
D£®Èô
¶þ¡¢Ìî¿ÕÌâ
13£®¹ØÓÚxµÄ²»µÈʽ2x____________
15£®ÊýÁÐ?an?ÖУ¬Èôa1?1£¬an?an?1??2x?3µÄ½â¼¯Îª_________£®
14£®ÒÑÖªº¯Êýf(x)(x?R)£¬Èôº¯Êýf(x+2)¹ýµã£¬ÄÇôº¯Êýy?|f(x)|Ò»¶¨¾¹ýµã£¨1£¬?2£©?x1?a1?a2?L?a2n??______£» n?N?£¬Ôòlimnn??2??16£®Èçͼ£¬½«È«ÌåÕýÕûÊýÅųÉÒ»¸öÈý½ÇÐÎÊýÕó£º
¸ù¾ÝÒÔÉÏÅÅÁйæÂÉ£¬ÊýÕóÖеÚn(n?3)ÐеĴÓ×óÖÁÓҵĵÚ3¸öÊýÊÇ £® Èý¡¢½â´ðÌâ
17£®ÒÑÖªÔÚ¦¤ABCÖУ¬ÄÚ½ÇA,B,CµÄ¶Ô±ß·Ö±ðΪa,b,c£¬AΪÈñ½Ç£¬ÇÒÂú×ã3b?5asinB. £¨1£©Çósin2A?cos£¨2£©Èôa?2B?CµÄÖµ£» 23£¬Çób,c. 2£»
£®
2,¦¤ABCµÄÃæ»ýΪ
18£®¼ÆËãÏÂÁи÷ʽµÄÖµ£º
19£®ÒÑÖªº¯Êý£¨1£©Çó£¨2£©Åжϣ¨3£©Çó
µÄ¶¨ÒåÓòΪ£¬ÇÒ¶ÔÈÎÒâµÄ
µÄÆæżÐÔ£»
µÄµ¥µ÷ÐÔ²¢Ö¤Ã÷£»
ÓÐ. µ±Ê±£¬£¬.
²¢Ö¤Ã÷
£»Èô¶ÔÈÎÒâºã³ÉÁ¢£¬ÇóʵÊýµÄÈ¡Öµ·¶Î§.
20£®ÒÑ֪ȫ¼¯U?R£¬¼¯ºÏA?xx?2x?3?0£¬¼¯ºÏB?x2?x?4. £¨1£©ÇóAUB£¬BI(CUA)£»
£¨2£©ÒÑÖª¼¯ºÏC?x2a?1?x?1£¬ÈôC?(CUA)?C£¬ÇóʵÊýaµÄÈ¡Öµ·¶Î§.
21£®ÈçͼËùʾ£¬ÔÚËÄÃæÌåPABCÖУ¬PC¡ÍAB£¬µãD£¬E£¬F£¬G·Ö±ðÊÇÀâAP£¬AC£¬BC£¬PBµÄÖе㣬ÇóÖ¤£º (1)DE¡ÎƽÃæBCP£» (2)ËıßÐÎDEFGΪ¾ØÐΣ®
?2?????
22£®ÒÑ֪Բ̨µÄÉÏ¡¢Ïµ×Ãæ°ë¾¶·Ö±ðÊÇ2 ,5 , ÇÒ²àÃæ»ýµÈÓÚÁ½µ×ÃæÃæ»ýÖ®ºÍ,Çó¸ÃԲ̨µÄĸÏß³¤. ¡¾²Î¿¼´ð°¸¡¿*** Ò»¡¢Ñ¡ÔñÌâ
ÌâºÅ 1 2 3 4 5 6 7 8 9 10 11 12 ´ð°¸ A B C C D B B D C D ¶þ¡¢Ìî¿ÕÌâ 13£®(??,?1)U(3,??) 14£®?3,2? 15£®
A D 2 3n2?n?616£®
2Èý¡¢½â´ðÌâ 17£®£¨¢ñ£©
53 £¨¢ò£© b?c?5 50ΪÆ溯Êý£»£¨2£©
µ¥µ÷µÝÔö£¬Ö¤Ã÷ÂÔ£»£¨3£©
.
18£®£¨1£©4£»£¨2£©5 19£®£¨1£©0,Ö¤Ã÷ÂÔ£¬
20£®(1) A?B?(??,?1]?[2,??)B?(CUA)?[2,3) (2) [0,??) 21£®(1)ÂÔ£» (2)ÂÔ. 22£®