Õã½Äþ²¨ÊÐ2020½ì¸ßÈý4Ô¸߿¼Ä£ÄâÊÔÌ⣨ÎÄ£©
Ò»¡¢Ñ¡ÔñÌ⣺±¾Ìâ¹²12СÌ⣬ÿСÌâ5·Ö£¬¹²60·Ö¡£ÔÚÿСÌâ¸ø³öµÄËĸöÑ¡ÏîÖУ¬Ö»ÓÐÒ»ÏîÊÇ·ûºÏÌâÄ¿ÒªÇóµÄ¡£
1£®Ä³¼¸ºÎÌåµÄÈýÊÓͼÈçͼËùʾ£¬Ôò¸Ã¼¸ºÎÌåµÄÌå»ýΪ£¨ £©
43A£®3 B£®3 53C£®3
D£®2
?2x+3y?3?0?2£®Éèx,yÂú×ãÔ¼ÊøÌõ¼þ?2x?3y?3?0£¬Ôòz?2x?yµÄ×îСֵÊÇ( )
?y?3?0?A£®?15 B£®?9 C£®1
D£®9
x2y2x2y23£®ÒÑÖªÍÖÔ²2?2?1(a?b?0)ÓëË«ÇúÏß2?2?1(m?0,n?0)Óй²Í¬µÄ½¹µãF1£¬F2£¬ÇÒÔÚµÚÒ»
mnabÏóÏÞÄÚÏཻÓÚµãP£¬ÍÖÔ²ÓëË«ÇúÏßµÄÀëÐÄÂÊ·Ö±ðΪe1£¬e2£®Èô?F1PF2??3 £¬Ôòe1?e2µÄ×îСֵÊÇ£¨ £©
1332A£®2 B£®2 C£®2 D£®2
?x?y?2?0?y?44£®Éèx£¬yÂú×ãÔ¼ÊøÌõ¼þ?2x?y?3?0£¬ÔòµÄÈ¡Öµ·¶Î§ÊÇ£¨ £©
x?6?x?y?0??1??,1????3,1? C£®???,?3?U?1,??? A£®?3? B£®
5£®ÔÚΪ£¨ £© A£®
B£®2
C£®
D£®4
ÖУ¬
·Ö±ðΪÄÚ½Ç
µÄ¶Ô±ß£¬Èô
?3??,1??D£®?7?
£¬
£¬Ôò
µÄÃæ»ýµÄ×î´óÖµ
6£®½«º¯Êýy?2sin(£¨ £©
????2x)?cos(?2x)(x?R)µÄͼÏñÏòÓÒƽÒƸöµ¥Î»³¤¶È£¬ËùµÃͼÏñ¶ÔÓ¦µÄº¯Êý364A£®ÔÚ(??2,0)ÉϵÝÔö B£®ÔÚ(??2,0)Éϵݼõ
(0,)(0,)6ÉϵÝÔö D£®ÔÚ6Éϵݼõ C£®ÔÚ
7£®Èçͼ£¬ÒÑÖªÏ߶ÎABÉÏÓÐÒ»¶¯µãD£¨DÒìÓÚA¡¢B£©,Ï߶ÎCD?AB,ÇÒÂú×ãCD2??AD?BD£¨?ÊÇ´óÓÚ0ÇÒ²»µÈÓÚ1µÄ³£Êý£©£¬ÔòµãCµÄÔ˶¯¹ì¼£Îª£¨ £©
??
A£®Ô²µÄÒ»²¿·Ö
C£®Ë«ÇúÏßµÄÒ»²¿·Ö D£®Å×ÎïÏßµÄÒ»²¿·Ö
B£®ÍÖÔ²µÄÒ»²¿·Ö
8£®DÊÇAµãÔÚBCÉϵÄÉäÓ°£¬ÔÚƽÃ漸ºÎÀïÓÐÉäÓ°¶¨Àí£ºÉèÈý½ÇÐÎABCµÄÁ½±ßAB¡ÍAC£¬ÔòAB2=BD?BC£®ÍØÕ¹µ½¿Õ¼ä£¬ÔÚËÄÃæÌåA-BCDÖУ¬AD¡ÍÃæABC£¬µãOÊÇAÔÚÃæBCDÄÚµÄÉäÓ°£¬ÇÒOÔÚ¡÷BCDÄÚ£¬Àà±ÈƽÃæÈý½ÇÐÎÉäÓ°¶¨Àí£¬µÃ³öÕýÈ·µÄ½áÂÛÊÇ£¨ £©
2A£®SVABC?SVBCO?SVBCD
2SVADC?SVDOC?SVBOC2B£®SVABD?SVBOD?SVBOC
2SVBDC?SVABD?SVABCC£® D£®
9£®ÒÑÖª¹«²îd¡Ù0µÄµÈ²îÊýÁÐ?an? Âú×ãa1£½1£¬ÇÒa2¡¢a4£2¡¢a6³ÉµÈ±ÈÊýÁУ¬ÈôÕýÕûÊým¡¢nÂú×ãm£n£½10£¬Ôòam£an£½£¨ £© A£®30
B£®20
C£®10
D£®5»ò40
10£®ÉòÀÏʦ¸æÖª¸ßÈýÎÄÊýÖÜ¿¼µÄ¸½¼ÓÌâÖ»ÓÐ6ÃûͬѧA£¬B£¬C£¬D£¬E£¬F³¢ÊÔ×öÁË£¬²¢ÇÒÕâ6ÈËÖÐÖ»ÓÐ1ÈË´ð¶ÔÁË£®Í¬Ñ§¼×²Â²â£ºD»òE´ð¶ÔÁË£»Í¬Ñ§ÒҲ²⣺C²»¿ÉÄÜ´ð¶Ô£»Í¬Ñ§±û²Â²â£ºA£¬B£¬Fµ±ÖбØÓÐ1ÈË´ð¶ÔÁË£»Í¬Ñ§¶¡²Â²â£ºD£¬E£¬F¶¼²»¿ÉÄÜ´ð¶Ô£®Èô¼×¡¢ÒÒ¡¢±û¡¢¶¡ÖÐÖ»ÓÐ1È˲¶ԣ¬Ôò´ËÈËÊÇ( ) A£®¼× B£®ÒÒ C£®±û D£®¶¡
11£®ÒÑÖªf(x)ÊǶ¨ÒåÔÚRÉϵÄÆ溯Êý£¬µ±x?0ʱ£¬f(x)?5x?m£¨mΪ³£Êý£©£¬Ôòf(?log57)µÄֵΪ£¨ £© A£®4
B£®-4
C£®6 ÖУ¬
D£®-6
ºÍ
ÊÇÓй«¹²Ð±±ßµÄµÈÑüÖ±½ÇÈý½ÇÐΣ¬ÈôÈýÀâ׶µÄÌå»ýΪ
£¬ÔòÖ±Ïß
ÓëƽÃæ
µÄÍâ½ÓÇòµÄ°ë
12£®ÔÚÈýÀâ׶
¾¶Îª2£¬ÇòÐÄΪ£¬ÇÒÈýÀâ׶A£®
B£®
C£®
D£®
Ëù³É½ÇµÄÕýÏÒÖµÊÇ£¨ £©
¶þ¡¢Ìî¿ÕÌ⣺±¾Ìâ¹²4СÌ⣬ÿСÌâ5·Ö£¬¹²20·Ö¡£ 13£®ÒÑ֪˫ÇúÏß½¥½üÏß½»ÓÚ£¬Á½µã.Èô
µÄÓÒ¶¥µãΪ£¬ÒÔΪԲÐÄ£¬ Ϊ°ë¾¶×÷Ô²£¬Ô²ÓëË«ÇúÏßµÄÒ»Ìõ£¬ÔòµÄÀëÐÄÂÊΪ________.
14£®ÉèÖ±ÈýÀâÖù
ABC?A1B1C1µÄËùÓж¥µã¶¼ÔÚÒ»¸öÇòÃæÉÏ£¬ÇÒÇòµÄ±íÃæ»ýÊÇ40?£¬
AB?AC?AA1?BAC?120o,,Ôò´ËÖ±ÈýÀâÖùµÄ¸ßÊÇ_______
15£®ÒÑÖªÏòÁ¿aÓëbµÄ¼Ð½ÇΪ30¡ã£¬
a?b?2£¬Ôò
a?bµÄ×î´óֵΪ_________£®
?0?x?2??y?2?x?2y16£®ÇøÓòDÓɲ»µÈʽ×é?¸ø¶¨£¬ÈôM(x,y)ΪDÉϵĶ¯µã£¬µãA(2,1)£¬OΪ×ø±êԵ㣬Ôò
uuuuruuurOM?OAµÄ×î´óֵΪ__________£®
Èý¡¢½â´ðÌ⣺¹²70·Ö¡£½â´ðӦд³öÎÄ×Ö˵Ã÷¡¢Ö¤Ã÷¹ý³Ì»òÑÝËã²½Öè¡£
17£®£¨12·Ö£©ÒÔƽÃæÖ±½Ç×ø±êϵxOyµÄÔµãΪ¼«µã£¬xÖáµÄÕý°ëÖáΪ¼«Öᣬ½¨Á¢¼«×ø±êϵ£¬Á½ÖÖ×ø±êϵÖÐ
?x?2?t?????42sin?????y?1?t£¨tÊDzÎÊý£©4?.?È¡ÏàͬµÄ³¤¶Èµ¥Î»£¬Ö±ÏßlµÄ²ÎÊý·½³ÌΪ?£¬Ô²CµÄ¼«×ø±ê·½³ÌΪ
ÇóÖ±ÏßlµÄÆÕͨ·½³ÌÓëÔ²CµÄÖ±½Ç×ø±ê·½³Ì£»ÉèÇúÏßCÓëÖ±ÏßlµÄ½»ÓÚA£¬BÁ½µã£¬ÈôPµãµÄÖ±½Ç×ø±êΪ
?2,1?£¬Çó
PA?PBµÄÖµ.
?x?2?rcos??C1y?rsin?xOy18£®£¨12·Ö£©ÔÚÖ±½Ç×ø±êϵÖУ¬ÇúÏߵIJÎÊý·½³ÌΪ? £¨?Ϊ²ÎÊý£©£¬ÒÔ×ø±êÔµãOΪ¼«µã£¬xÖáÕý°ëÖáΪ¼«ÖὨÁ¢¼«×ø±êϵ£¬ÇúÏß
C2µÄ¼«×ø±ê·½³ÌΪ
?sin?????????3CC6?£¬ÇÒÇúÏß1Óë2Ç¡
ÓÐÒ»¸ö¹«¹²µã.ÇóÇúÏß´óÖµ.
C1µÄ¼«×ø±ê·½³Ì£»ÒÑÖªÇúÏß
C1ÉÏÁ½µãA£¬BÂú×ã
?AOB??4£¬Çó?AOBÃæ»ýµÄ×î
19£®£¨12·Ö£©ÒÑÖªº¯Êýf(x)?lnx?ax?a£¬
g(x)?x?1ex.ÌÖÂÛf(x)µÄµ¥µ÷ÐÔ£»Èôf(x)?0ºã³ÉÁ¢£¬Ö¤
f(x1)?f(x2)11??1f(x)(g(x)?1)?g(x)?0?x1?x2x1?x2x1e2. Ã÷£ºµ±Ê±£¬.ÔÚ£¨II£©µÄÌõ¼þÏ£¬Ö¤Ã÷£º
20£®£¨12·Ö£©ÔÚ¹«²î²»Îª0µÄµÈ²îÊýÁÐ
?an?ÖУ¬a1,a4,a8³ÉµÈ±ÈÊýÁУ¬ÊýÁÐ?an?µÄÇ°10ÏîºÍΪ45£®ÇóÊý
ÁÐ
?an?µÄͨÏʽ£»Èô
bn?1anan?1£¬ÇÒÊýÁÐ?bn?µÄÇ°ÏîºÍΪTn£¬ÇóTn£®
£¬
21£®£¨12·Ö£©ÒÑÖªº¯Êý
f?x??loga?x?1?g?x??loga?1?x?£¨ÆäÖÐa?0£¬ÇÒa?1£©.Çóº¯Êý
f?x??g?x?¼¯ºÏ.
µÄ¶¨ÒåÓò.ÅжϺ¯Êý
f?x??g?x?µÄÆæżÐÔ£¬²¢ÓèÒÔÖ¤Ã÷.Çóʹ
f?x??g?x??0³ÉÁ¢µÄxµÄ
*an?b?log2?an?1?a1?1an?2an?1?1?n?2,n?N??b??22£®£¨10·Ö£©ÒÑÖªÊýÁÐÖУ¬£¬£®¼Çn£¬ÅжÏnÊÇ
cn?·ñΪµÈ²îÊýÁУ¬²¢ËµÃ÷ÀíÓÉ£»ÔÚ£¨1£©µÄÌõ¼þÏ£¬Éè
bnan?1£¬ÇóÊýÁÐ?cn?µÄÇ°nÏîºÍTn£®
²Î¿¼´ð°¸
Ò»¡¢Ñ¡ÔñÌ⣺±¾Ìâ¹²12СÌ⣬ÿСÌâ5·Ö£¬¹²60·Ö¡£ÔÚÿСÌâ¸ø³öµÄËĸöÑ¡ÏîÖУ¬Ö»ÓÐÒ»ÏîÊÇ·ûºÏÌâÄ¿ÒªÇóµÄ¡£ 1£®A 2£®A 3£®C 4£®B 5£®A 6£®C 7£®B 8£®A 9£®A 10£®D 11£®D 12£®D
¶þ¡¢Ìî¿ÕÌ⣺±¾Ìâ¹²4СÌ⣬ÿСÌâ5·Ö£¬¹²20·Ö¡£ 13£®
14£®22 15£®4?23 16£®4
Èý¡¢½â´ðÌ⣺¹²70·Ö¡£½â´ðӦд³öÎÄ×Ö˵Ã÷¡¢Ö¤Ã÷¹ý³Ì»òÑÝËã²½Öè¡£ 17£® (¢ñ) y?x?1£¬x2?y2?4x?4y?0£¨¢ò£©2 ¡¾½âÎö¡¿ ¡¾·ÖÎö¡¿
£¨1£©Ö±ÏßlµÄ²ÎÊý·½³ÌÏûÈ¥²ÎÊý£¬ÄÜÇó³öÖ±ÏßlµÄÆÕͨ·½³Ì£»ÀûÓü«×ø±êÓëÖ±½Ç×ø±êµÄ»¥»¯¹Øϵ¼´¿ÉµÃµ½Ô²CµÄÖ±½Ç×ø±ê£»
??x?2??£¨2£©µãP?2,1?ÔÚÖ±ÏßlÉÏ£¬ÇÒÔÚÔ²ÄÚ£¬Ö±ÏßlµÄ²ÎÊý·½³ÌÊÇ??y?1???µÃt2?2t?7?0£¬ÓÉ´ËÄÜÇó³öPA?PBµÄÖµ. ¡¾Ïê½â¡¿
2t222£¬´úÈëx?y?4x?4y?0£¬2t2