Ò»ÌõÍäÇúµÄ¼òµ¥·â±ÕÇúÏß±»Ò»ÕÅ°×Ö½¸ÇסÁË£¬°×Ö½ÖмäÓÐÒ»¸öÕý·½ÐεĶ´£¬ÎÒÃÇ¿ÉÒÔ¿´µ½²¿·ÖÇúÏߣ¨ÈçͼËùʾ£©¡£ÏÖÔÚ£¬Èç¹ûÇøÓòAÊÇÔÚÇúÏßµÄÄÚ²¿£¬ÄÇôÇëÎÊBÊÇÔÚ·â±ÕÇúÏßµÄÄÚ²¿»¹ÊÇÍⲿ£¿
СÍõ¡¢ÀÏÀС½¡¢ÀϹù¡¢Ð¡ÕÅ¡¢ÀϽð¡¢Ð¡ÕÔºÍÀÏÑî°ËÈËÔÚÒ»´Î¼ÝУ¿¼ÊÔÖг鵽ÁËÇúÏßÐÐÊ»£¨¹ýSÍ䣩£¬ÎÊ£ºË×îÖÕûÓÐͨ¹ý£¿ÎªÊ²Ã´£¿
ÔÚÕâÈý¸öȦÉϼÓÁ½±Ê¡£±ä³É¹·¹·¡£Ö»ÄܼÓÁ½±Ê¡£Ö±ÏßÇúÏßËæ±ãÄã¡£
ÒÑÖªÇúÏßC1£ºF(x£¬y)=0£¬C2£ºF(x£¬y£©+¦ËF£¨m£¬n£©=0£¨¦Ë¡Ù0£©£¬µãA£¨m£¬n£©²»ÔÚÇúÏßC1ÉÏ£¬ÊÔÇóÁ½ÇúÏßC1ºÍC2µÄ½»µã¸öÊý.
º¯ÊýfºÍËüµÄÇ°2¸öµ¼ÊýÊÇÁ¬ÐøµÄ,f(x)>=0, f(0)=f ' (0)= 0, ²¢ÇÒf '' (0)>0 . Çóµ±aÇ÷½üÓÚ0+ʱºò,ÏÂÁÐÃæ»ýµÄ±È£ºÇúÏßÏÂÃ棺y=0ÉÏÃ棺 Óëx=0,x=aÏཻµÄÃæ»ý£º(0£¬0), (a,0), (a, f(a))ËùÐγɵÄÈý½ÇÐÎÃæ»ýµÄ±È¡£
ÇúÏߦ££ºy2 = 4x ÉÏÒ»¶¨µãP(x0£¬2)£¬·½ÏòÏòÁ¿Îªd = (1£¬-1) µÄÖ±Ïßl£¨²»¹ýP µã£©ÓëÇúÏߦ£ ½»ÓÚA¡¢B Á½µã£¬ÉèÖ±ÏßPA¡¢PB бÂÊ·Ö±ðΪkPA£¬kPB£¬ÇëÎÊkPA + kPB µÄֵΪ£¿
¿¨Ð¡ÐÞÊýѧ´óðÏÕ4 ¿¨ÐÞ˹Êý¶À
Ç°ÇéÇë¿´#329457
¿¨ÐÞ˹ËûÃǽáÊøÁËÓëÓÈÃ×ÄȵÄÕ½¶·£¬×¼±¸Ç°ÍùÏÂÒ»¸öÄ¿µÄµØʱ£¬¿¨ÐÞ˹µÄβ°Í²»É÷ÏÝÈëÓÙÄàÀÓÙÄàµÄÉÏ·½³öÏÖÁËÒ»¿éÐéÄâÌâ°å£º
¡°ÉîÀ¶ºÍdzÀ¶É«ÇúÏß×é³ÉÁË¿¨ÐÞ˹µÄβ°Í£¬³ÈÉ«ºÍ»ÆÉ«×é³ÉÁËβ°ÍÉϵĹ⻷¡£Ã¿ÐС¢Ã¿ÁÐÌîÈë1~6²»Öظ´¡£¸ÃÊý¶ÀµÄ±äÐιæÔòΪ£ºÇúÏßÉϵÄ×ÏɫСԲȦËùÔڵĸñ½Ð¡°Ç¬À¤·´×ª¸ñ¡±¡£¶ÔÓÚÿһ¸öǬÀ¤·´×ª¸ñ£¬Ëü°ÑËüËùÔÚµÄÇúÏß·Ö³ÉһС½ØºÍÒ»´ó½Ø£¨²»°üÀ¨Ç¬À¤·´×ª¸ñ±¾Éí£©£¬Ä³Ò»½ØÇúÏß°üÀ¨ÁíÍâÒ»¸öǬÀ¤·´×ª¸ñ£¨Èç¹ûÓУ©£¬²»»á±»ÁíÍâÒ»¸öǬÀ¤·´×ª¸ñ×è¶Ï¡£Ã¿Ò»¸öǬÀ¤·´×ª¸ñÑØÇúÏß·½Ïò¶¼ÓÐÁ½¸öÏàÁÚ¸ñ¡£ÔÚ¿¨ÐÞ˹µÄβ°ÍÇúÏßÉÏ£¬Î»ÓÚһС½ØµÄÏàÁÚ¸ñÓëǬÀ¤·´×ª¸ñÆæżÐÔÏàͬ£¬Î»ÓÚÒ»´ó½ØµÄÏàÁÚ¸ñÓëǬÀ¤·´×ª¸ñÆæżÐÔÏà·´¡£ÔÚβ°ÍÉÏ·½µÄ¹â»·ÇúÏßÉÏ£¬Èç¹ûǬÀ¤·´×ª¸ñÀïÌîÈëÆæÊý£¬ÄÇôλÓÚһС½ØµÄÏàÁÚ¸ñÀïµÄÊý´óÓÚÕâ¸öÆæÊý£¬Î»ÓÚ´ó½ØµÄÏàÁÚ¸ñµÄÊýСÓÚÕâ¸öÆæÊý£»Èç¹ûǬÀ¤·´×ª¸ñÀïÌîÈëżÊý£¬ÄÇôλÓÚС½ØµÄÏàÁÚ¸ñµÄÊýСÓÚÕâ¸öżÊý£¬Î»ÓÚ´ó½ØµÄÏàÁÚ¸ñµÄÊý´óÓÚÕâ¸öżÊý¡£ÔòC3ºÍF2·Ö±ðÌîÈ뼸£¿¡±
ÑÛ¼û×Åβ°ÍÔÚÒ»µãµãµØϳÁ£¬¿¨ÐÞ˹¾øÍûµØ¾ÍÒª¡°×³Ê¿¶Ïβ¡±ÁË£¬Ðļ±Èç·ÙµÄ¿¨Ð¡ÐÞºÍÃ×Èð˹ÕÒÁËÖ½±ÊÒ»ÈËËãÒ»¸öÊý£¬ÖÕÓڵóöÁ˴𰸣¬´ËʱÄà̶¾à¿¨ÐÞ˹µÄ±ÇÇ»£¬»¹ÓÐ1ÄÉÃ×£¡
ÇëÎÊC3ºÍF2µ½µ×·Ö±ðÌîÈ뼸ÄØ£¿
ÄѶȣº½ÏÄÑ
ÒÑÖªÖÐÐÄÔÚÔµãµÄË«ÇúÏßC µÄÓÒ½¹µãΪ(2£¬0)£¬ÓÒ¶¥µãΪ(¡Ì3£¬0) .
Ë«ÇúÏßC µÄ·½³ÌΪx2/3 - y2/1 = 1£¬ÈôÖ±Ïßl£ºy = kx + ¡Ì2 ÓëË«ÇúÏßC ºãÓÐÁ½¸ö²»Í¬µÄ½»µãA ºÍB£¬ÇÒÏòÁ¿OA¡¤ÏòÁ¿OB > 2£¬ÇóʵÊýk µÄÈ¡Öµ·¶Î§¡£
A¡¢(-¡Ì3£¬-¡Ì3/3)¡È(¡Ì3/3£¬¡Ì3)
B¡¢(-¡Ì3£¬-¡Ì3/3)¡È(-¡Ì3/3£¬¡Ì3/3)¡È(¡Ì3/3£¬¡Ì3)
ÉèµãF(-c£¬0)ÊÇË«ÇúÏß(x^2)/(a^2)¨C(y^2)/(b^2) = 1µÄ×󽹵㣬¹ýF×÷Ö±ÏßLÓëË«ÇúÏß×ó£¬ÓÒÁ½Ö§·Ö±ð½»ÓÚA¡¢BÁ½µã£¬ÆäÖеãBµÄºá×ø±êΪc/2£¬ÈôÏòÁ¿FA = x¡¤ÏòÁ¿AB £¬ÇÒx¡Ê[2/3£¬3/4]£¬ÔòË«ÇúÏßÀëÐÄÂʵÄÈ¡Öµ·¶Î§ÊǶàÉÙ£¿
¡¾²¹³ä˵Ã÷¡¿Ñ¡ÏîÖеġ°¡Ì¡±±íʾ£º¸ùºÅ
SroanµÄ¸ç¸çÕýÔÚ¼ÒÀï¾ÙÐÐͬѧ¾Û»áÄØ!´ó¼Ò¶¼ºÜϲ»¶ÌýSroan¼ÒµÄÀÏʽ³ªÆ¬»úÀï²¥·ÅµÄÓÆÑïÒôÀÖ£¬ÓеÄ̸Ì죬ÓеÄÌøÎ裬ÓеÄÍæÓÎÏ·£¬ÈÈÄÖ¼«ÁË¡£Õâʱ£¬Ò»¸öÔú×ÅÂíβ±èµÄÅ®º¢¶Ô´ó¼Ò˵£º¡°ÎÒ²¢Ã»ÓкȾƣ¬ÎÒ±¾À´Ïë»Ö±Ïߣ¬¿É»ºÃºóÒ»¿´È´ÊÇÇúÏߣ¬µ«ÊÇÒ»»ÇúÏß½á¹ûÓÖ±ä³ÉÁËÖ±Ïß¡£Çë¸æËßÎÒ£¬ÕâÊÇΪʲô£¿µ±È»ÎÒÊÇÓÃÆÕͨµÄ±ÊÔÚÒ»ÕÅƽֽÉÏ»µÄ¡£ÄãÖªµÀÕâÊÇÔõôһ»ØÊÂÂð£¿