±¾ÌâÉèÓУ¨1£©£¨2£©£¨3£©Èý¸öÑ¡¿¼Ì⣬ÿÌâ7·Ö£¬Ç뿼ÉúÈÎÑ¡2Ìâ×÷´ð£¬Âú·Ö14·Ö¡£Èç¹û¶à×ö£¬Ôò°´Ëù×öµÄÇ°Á½Ìâ¼Ç·Ö¡£×÷´ðʱ£¬ÏÈÓÃ2BǦ±ÊÔÚ´ðÌ⿨ÉÏ°ÑËùÑ¡ÌâÄ¿¶ÔÓ¦µÄÌâºÅÍ¿ºÚ£¬²¢½«ËùÑ¡ÌâºÅÌîÈëÀ¨ºÅÖС£
£¨1£©£¨±¾Ð¡ÌâÂú·Ö7·Ö£©Ñ¡ÐÞ4-2£º¾ØÕóÓë±ä»»
ÒÑÖª¾ØÕóM=£¬N=£¬ÇÒMN=¡£
£¨¢ñ£©ÇóʵÊýa,b,c,dµÄÖµ£»£¨¢ò£©ÇóÖ±Ïßy=3xÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任×÷ÓÃϵÄÏñµÄ·½³Ì¡£
£¨2£©£¨±¾Ð¡ÌâÂú·Ö7·Ö£©Ñ¡ÐÞ4-4£º×ø±êϵÓë²ÎÊý·½³Ì
ÔÚÖ±½Ç×ø±êϵxOyÖУ¬Ö±ÏßLµÄ²ÎÊý·½³ÌΪ £¨tΪ²ÎÊý£©£¬ÔÚ¼«×ø±êϵ£¨ÓëÖ±½Ç×ø±êϵxOyÈ¡ÏàͬµÄ³¤¶Èµ¥Î»£¬ÇÒÒÔÔ­µãOΪ¼«µã£¬ÒÔxÖáÕý°ëÖáΪ¼«ÖᣩÖУ¬Ô²CµÄ·½³ÌΪ=2sin¡£
£¨¢ñ£©ÇóÔ²CµÄÖ±½Ç×ø±ê·½³Ì£»
£¨¢ò£©ÉèÔ²CÓëÖ±ÏßL½»ÓÚµãA,B¡£ÈôµãPµÄ×ø±êΪ£¨3£¬£©£¬Çó¨OPA¨O+¨OPB¨O¡£
£¨3£©£¨±¾Ð¡ÌâÂú·Ö7·Ö£©Ñ¡ÐÞ4-5£º²»µÈʽѡ½²
ÒÑÖªº¯Êýf(x)= ¨Ox-a¨O.
£¨¢ñ£©Èô²»µÈʽf(x) 3µÄ½â¼¯Îª£¬ÇóʵÊýaµÄÖµ£»
£¨¢ò£©ÔÚ£¨¢ñ£©µÄÌõ¼þÏ£¬Èôf(x)+f(x+5)¡Ým¶ÔÒ»ÇÐʵÊýxºã³ÉÁ¢£¬ÇóʵÊýmµÄÈ¡Öµ·¶Î§¡£

£¨1£©Ñ¡ÐÞ4-2£º¾ØÕóÓë±ä»»
±¾Ð¡ÌâÖ÷Òª¿¼²é¾ØÕóÓë±ä»»µÈ»ù´¡ÖªÊ¶£¬¿¼²éÔËËãÇó½âÄÜÁ¦¡£Âú·Ö7·Ö¡£
½â·¨Ò»£º
£¨¢ñ£©ÓÉÌâÉèµÃ£º
£¨¢ò£©ÒòΪ¾ØÕóMΪ¶ÔÓ¦µÄÏßÐԱ任½«Ö±Ïß±ä³ÉÖ±Ïߣ¨»òµã£©£¬ËùÒÔ¿ÉÈ¡Ö±Ïßy=3xÉϵÄÁ½µã£¨0£¬0£©£¬£¨1£¬3£©£¬
ÓÉ
µã£¨0£¬0£©£¬£¨1£¬3£©ÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任×÷ÓÃϵÄÏñÊǵ㣨0£¬0£©£¬£¨-2£¬2£©.
´Ó¶ø£¬Ö±Ïßy=3xÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任×÷ÓÃϵÄÏñµÄ·½³ÌΪy=-x¡£
½â·¨¶þ£º
£¨¢ñ£©Í¬½â·¨Ò»¡£
£¨¢ò£©ÉèÖ±Ïßy=3xÉϵÄÈÎÒâµã£¨x,y£©ÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任×÷ÓÃϵÄÏñÊǵ㣨x¡¯,y¡¯£©£¬ÓÉ
ÓÉ£¨x,y£©µÄÈÎÒâÐÔ¿ÉÖª£¬Ö±Ïßy=3xÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任×÷ÓÃϵÄÏñµÄ·½³ÌΪy= -x¡£
£¨2£©Ñ¡ÐÞ4-4£º×ø±êϵÓë²ÎÊý·½³Ì
±¾Ð¡ÌâÖ÷Òª¿¼²éÖ±ÏߵIJÎÊý·½³Ì¡¢Ô²µÄ¼«×ø±ê·½³Ì¡¢Ö±ÏßÓëÔ²µÄλÖùØϵµÈ»ù´¡ÖªÊ¶£¬¿¼²éÔËËãÇó½âÄÜÁ¦¡£Âú·Ö7·Ö¡£
½â·¨Ò»£º

¹ÊÓÉÉÏʽ¼°tµÄ¼¸ºÎÒâÒåµÃ
½â·¨¶þ£º
£¨¢ñ£©Í¬½â·¨Ò»¡£
£¨¢ò£©ÒòΪԲCµÄÔ²ÐÄΪ£¨0£¬£©£¬°ë¾¶r=,Ö±ÏßlµÄÆÕͨ·½³ÌΪ£ºy=-x+3+.
ÓɽâµÃ£º»ò
²»·ÁÉèA£¨1£¬2+£© £¬B£¨2£¬1+£©£¬ÓÖµãPµÄ×ø±êΪ£¨3£¬£©£¬

ÓÖÒÑÖª²»µÈʽf(x) 3µÄ½â¼¯Îª£¬ËùÒÔ½âµÃa=2.
£¨¢ò£©µ±a=2ʱ£¬f(x)=¨Ox-2¨O.Éèg(x)=f(x)+f(x+5)£¬ÓÚÊÇ

×ÛÉϿɵã¬g(x)µÄ×îСֵΪ5.
´Ó¶ø£¬Èôf(x)+f(x+5)¡Ým¼´g(x) ¡Ým ¶ÔÒ»ÇÐʵÊýx ºã³ÉÁ¢£¬ÔòmµÄÈ¡Öµ·¶Î§Îª(-£¬5].
½â·¨¶þ£º
£¨¢ñ£©Í¬½â·¨Ò»¡£
£¨¢ò£©µ±a=2ʱ£¬f(x)=¨Ox-2¨O.Éèg(x)=f(x)+f(x+5).
ÓɨOx-2¨O+¨Ox+3¨O¡Ý¨O(x-2)-(x+3)¨O="5" £¨µ±ÇÒ½öµ±-3x2ʱµÈºÅ³ÉÁ¢£©µÃ£¬g(x)µÄ×îСֵΪ5.
´Ó¶ø£¬Èôf(x)+f(x+5) ¡Ým ¼´ g(x) ¡Ým¶ÔÒ»ÇÐʵÊýxºã³ÉÁ¢£¬ÔòmµÄÈ¡Öµ·¶Î§Îª(-£¬5].

½âÎö

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º

±¾ÌâÉèÓУ¨1£©£¨2£©£¨3£©Èý¸öÑ¡¿¼Ì⣬ÿÌâ7·Ö£¬Ç뿼ÉúÈÎÑ¡2Ìâ×÷´ð£¬Âú·Ö14·Ö£®Èç¹û¶à×ö£¬Ôò°´Ëù×öµÄÇ°Á½Ìâ¼Æ·Ö£®×÷´ðʱ£¬ÏÈÓÃ2BǦ±ÊÔÚ´ðÌ⿨ÉÏ°ÑËùÑ¡ÌâÄ¿¶ÔÓ¦µÄÌâºÅÍ¿ºÚ£¬²¢½«ËùÑ¡ÌâºÅÌîÈëÀ¨ºÅÖУ®
£¨1£©ÒÑÖª¾ØÕóM=
1a
b1
£¬N=
c2
0d
£¬ÇÒMN=
20
-20
£¬
£¨¢ñ£©ÇóʵÊýa£¬b£¬c£¬dµÄÖµ£»£¨¢ò£©ÇóÖ±Ïßy=3xÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任ϵÄÏñµÄ·½³Ì£®
£¨2£©ÔÚÖ±½Ç×ø±êϵxoyÖУ¬Ö±ÏßlµÄ²ÎÊý·½³ÌΪ
x=3-
2
2
t
y=
5
-
2
2
t
£¨tΪ²ÎÊý£©£®ÔÚ¼«×ø±êϵ£¨ÓëÖ±½Ç×ø±êϵxoyÈ¡ÏàͬµÄ³¤¶Èµ¥Î»£¬ÇÒÒÔÔ­µãOΪ¼«µã£¬ÒÔxÖáÕý°ëÖáΪ¼«ÖᣩÖУ¬Ô²CµÄ·½³ÌΪ¦Ñ=2
5
sin¦È
£®
£¨¢ñ£©ÇóÔ²CµÄÖ±½Ç×ø±ê·½³Ì£»£¨¢ò£©ÉèÔ²CÓëÖ±Ïßl½»ÓÚµãA¡¢B£¬ÈôµãPµÄ×ø±êΪ(3£¬
5
)
£¬
Çó|PA|+|PB|£®
£¨3£©ÒÑÖªº¯Êýf£¨x£©=|x-a|£®
£¨¢ñ£©Èô²»µÈʽf£¨x£©¡Ü3µÄ½â¼¯Îª{x|-1¡Üx¡Ü5}£¬ÇóʵÊýaµÄÖµ£»
£¨¢ò£©ÔÚ£¨¢ñ£©µÄÌõ¼þÏ£¬Èôf£¨x£©+f£¨x+5£©¡Ým¶ÔÒ»ÇÐʵÊýxºã³ÉÁ¢£¬ÇóʵÊýmµÄÈ¡Öµ·¶Î§£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º2010Äê¸ß¿¼ÊÔÌ⣨¸£½¨¾í£©½âÎö°æ£¨Àí£© ÌâÐÍ£º½â´ðÌâ

 ±¾ÌâÉèÓУ¨1£©£¨2£©£¨3£©Èý¸öÑ¡¿¼Ì⣬ÿÌâ7·Ö£¬Ç뿼ÉúÈÎÑ¡2Ìâ×ö´ð£¬Âú·Ö14·Ö¡£Èç¹û¶à×ö£¬Ôò°´Ëù×öµÄÇ°Á½Ìâ¼Æ·Ö¡£×÷´ðʱ£¬ÏÈÓÃ2BǦ±ÊÔÚ´ðÌ⿨ÉÏ°ÑËùÑ¡ÌâÄ¿¶ÔÓ¦µÄÌâºÅÍ¿ºÚ£¬²¢½«ËùÑ¡ÌâºÅÌîÈëÀ¨ºÅÖС£

£¨1£©Ñ¡ÐÞ4-2£º¾ØÕóÓë±ä»»

ÒÑÖª¾ØÕóM=£¬£¬ÇÒ£¬

£¨¢ñ£©ÇóʵÊýµÄÖµ£»£¨¢ò£©ÇóÖ±ÏßÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任ϵÄÏñµÄ·½³Ì¡£

£¨2£©Ñ¡ÐÞ4-4£º×ø±êϵÓë²ÎÊý·½³Ì

ÔÚÖ±½Ç×ø±êϵxoyÖУ¬Ö±ÏߵIJÎÊý·½³ÌΪ£¨tΪ²ÎÊý£©¡£ÔÚ¼«×ø±êϵ£¨ÓëÖ±½Ç×ø±êϵxoyÈ¡ÏàͬµÄ³¤¶Èµ¥Î»£¬ÇÒÒÔÔ­µãOΪ¼«µã£¬ÒÔxÖáÕý°ëÖáΪ¼«ÖᣩÖУ¬Ô²CµÄ·½³ÌΪ¡£

£¨¢ñ£©ÇóÔ²CµÄÖ±½Ç×ø±ê·½³Ì£»£¨¢ò£©ÉèÔ²CÓëÖ±Ïß½»ÓÚµãA¡¢B£¬ÈôµãPµÄ×ø±êΪ£¬

Çó|PA|+|PB|¡£

£¨3£©Ñ¡ÐÞ4-5£º²»µÈʽѡ½²

ÒÑÖªº¯Êý¡£

£¨¢ñ£©Èô²»µÈʽµÄ½â¼¯Îª£¬ÇóʵÊýµÄÖµ£»

£¨¢ò£©ÔÚ£¨¢ñ£©µÄÌõ¼þÏ£¬Èô¶ÔÒ»ÇÐʵÊýxºã³ÉÁ¢£¬ÇóʵÊýmµÄÈ¡Öµ·¶Î§¡£

 

 

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º¸£½¨ ÌâÐÍ£º½â´ðÌâ

±¾ÌâÉèÓУ¨1£©£¨2£©£¨3£©Èý¸öÑ¡¿¼Ì⣬ÿÌâ7·Ö£¬Ç뿼ÉúÈÎÑ¡2Ìâ×÷´ð£¬Âú·Ö14·Ö£®Èç¹û¶à×ö£¬Ôò°´Ëù×öµÄÇ°Á½Ìâ¼Æ·Ö£®×÷´ðʱ£¬ÏÈÓÃ2BǦ±ÊÔÚ´ðÌ⿨ÉÏ°ÑËùÑ¡ÌâÄ¿¶ÔÓ¦µÄÌâºÅÍ¿ºÚ£¬²¢½«ËùÑ¡ÌâºÅÌîÈëÀ¨ºÅÖУ®
£¨1£©ÒÑÖª¾ØÕóM=
1a
b1
£¬N=
c2
0d
£¬ÇÒMN=
20
-20
£¬
£¨¢ñ£©ÇóʵÊýa£¬b£¬c£¬dµÄÖµ£»£¨¢ò£©ÇóÖ±Ïßy=3xÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任ϵÄÏñµÄ·½³Ì£®
£¨2£©ÔÚÖ±½Ç×ø±êϵxoyÖУ¬Ö±ÏßlµÄ²ÎÊý·½³ÌΪ
x=3-
2
2
t
y=
5
-
2
2
t
£¨tΪ²ÎÊý£©£®ÔÚ¼«×ø±êϵ£¨ÓëÖ±½Ç×ø±êϵxoyÈ¡ÏàͬµÄ³¤¶Èµ¥Î»£¬ÇÒÒÔÔ­µãOΪ¼«µã£¬ÒÔxÖáÕý°ëÖáΪ¼«ÖᣩÖУ¬Ô²CµÄ·½³ÌΪ¦Ñ=2
5
sin¦È
£®
£¨¢ñ£©ÇóÔ²CµÄÖ±½Ç×ø±ê·½³Ì£»£¨¢ò£©ÉèÔ²CÓëÖ±Ïßl½»ÓÚµãA¡¢B£¬ÈôµãPµÄ×ø±êΪ(3£¬
5
)
£¬
Çó|PA|+|PB|£®
£¨3£©ÒÑÖªº¯Êýf£¨x£©=|x-a|£®
£¨¢ñ£©Èô²»µÈʽf£¨x£©¡Ü3µÄ½â¼¯Îª{x|-1¡Üx¡Ü5}£¬ÇóʵÊýaµÄÖµ£»
£¨¢ò£©ÔÚ£¨¢ñ£©µÄÌõ¼þÏ£¬Èôf£¨x£©+f£¨x+5£©¡Ým¶ÔÒ»ÇÐʵÊýxºã³ÉÁ¢£¬ÇóʵÊýmµÄÈ¡Öµ·¶Î§£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º2010Ä긣½¨Ê¡¸ß¿¼ÊýѧÊÔ¾í£¨Àí¿Æ£©£¨½âÎö°æ£© ÌâÐÍ£º½â´ðÌâ

±¾ÌâÉèÓУ¨1£©£¨2£©£¨3£©Èý¸öÑ¡¿¼Ì⣬ÿÌâ7·Ö£¬Ç뿼ÉúÈÎÑ¡2Ìâ×÷´ð£¬Âú·Ö14·Ö£®Èç¹û¶à×ö£¬Ôò°´Ëù×öµÄÇ°Á½Ìâ¼Æ·Ö£®×÷´ðʱ£¬ÏÈÓÃ2BǦ±ÊÔÚ´ðÌ⿨ÉÏ°ÑËùÑ¡ÌâÄ¿¶ÔÓ¦µÄÌâºÅÍ¿ºÚ£¬²¢½«ËùÑ¡ÌâºÅÌîÈëÀ¨ºÅÖУ®
£¨1£©ÒÑÖª¾ØÕóM=£¬£¬ÇÒ£¬
£¨¢ñ£©ÇóʵÊýa£¬b£¬c£¬dµÄÖµ£»£¨¢ò£©ÇóÖ±Ïßy=3xÔÚ¾ØÕóMËù¶ÔÓ¦µÄÏßÐԱ任ϵÄÏñµÄ·½³Ì£®
£¨2£©ÔÚÖ±½Ç×ø±êϵxoyÖУ¬Ö±ÏßlµÄ²ÎÊý·½³ÌΪ£¨tΪ²ÎÊý£©£®ÔÚ¼«×ø±êϵ£¨ÓëÖ±½Ç×ø±êϵxoyÈ¡ÏàͬµÄ³¤¶Èµ¥Î»£¬ÇÒÒÔÔ­µãOΪ¼«µã£¬ÒÔxÖáÕý°ëÖáΪ¼«ÖᣩÖУ¬Ô²CµÄ·½³ÌΪ£®
£¨¢ñ£©ÇóÔ²CµÄÖ±½Ç×ø±ê·½³Ì£»£¨¢ò£©ÉèÔ²CÓëÖ±Ïßl½»ÓÚµãA¡¢B£¬ÈôµãPµÄ×ø±êΪ£¬
Çó|PA|+|PB|£®
£¨3£©ÒÑÖªº¯Êýf£¨x£©=|x-a|£®
£¨¢ñ£©Èô²»µÈʽf£¨x£©¡Ü3µÄ½â¼¯Îª{x|-1¡Üx¡Ü5}£¬ÇóʵÊýaµÄÖµ£»
£¨¢ò£©ÔÚ£¨¢ñ£©µÄÌõ¼þÏ£¬Èôf£¨x£©+f£¨x+5£©¡Ým¶ÔÒ»ÇÐʵÊýxºã³ÉÁ¢£¬ÇóʵÊýmµÄÈ¡Öµ·¶Î§£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸