£¨1£©Ô²µÄ±ê×¼·½³Ì (x?a)2?(y?b)2?r2.
£¨2£©Ô²µÄÒ»°ã·½³Ì x2?y2?Dx?Ey?F?0(D2?E2?4F£¾0).
19.µãÓëÔ²µÄλÖùØϵ
µãP(x0,y0)ÓëÔ²(x?a)2?(y?b)2?r2µÄλÖùØϵÓÐÈýÖÖ
Èôd?(a?x0)2?(b?y0)2£¬Ôò d?r?µãPÔÚÔ²Íâ;d?r?µãPÔÚÔ²ÉÏ;d?r?µãPÔÚÔ²ÄÚ. xº¯Êýy?f(x)ÔÚµã0´¦µÄµ¼ÊýµÄ¼¸ºÎÒâÒå º¯Êýy?f(x)ÔÚµãx0´¦µÄµ¼ÊýÊÇÇúÏßy?f(x)ÔÚP(x0,f(x0))´¦µÄÇÐÏßµÄбÂÊf?(x0)£¬ÏàÓ¦µÄÇÐÏß·½³Ì
?f?(x0)(x?x0). 0ʮһ.Բ׶ÇúÏß·½³Ì x2y2??1(a>b>0); a2b2b2a21. ÍÖÔ²£º ¢Ù·½³Ì ¢Ú¶¨Òå: |PF1|+|PF2|=2a>2c£» ¢Û e=c?a1? ¢Ü³¤Ö᳤Ϊ2a£¬
¶ÌÖ᳤Ϊ2b£» ¢Ýa2=b2+c2 £» ?¢ÞS?PFF=b2tan 1222.Ë«ÇúÏß
S?PF1F2x2y2£º¢Ù·½³Ì2?2?1(a,b>0)£»¢Ú¶¨Òå: ||PF1|-|PF2||=2a<2c£»
ab ¢Ûe=c?a1?b2a2,c2=a2+b2£» ¢Ü
=b2cot?2 ¢à½¥½øÏß
x2y2b??0y??x; »ò
aa2b2
p23.Å×ÎïÏß ¢Ù·½³Ìy2=2px £» ¢Ú¶¨Òå:|PF|=d×¼£»¢Û¶¥µãΪ½¹µãµ½×¼Ïß´¹Ï߶ÎÖеã;x,y·¶Î§?Ö᣿½¹µãF(,0),×¼Ïßx=-, ¢Ü½¹°ë¾¶
pAF?xA?22p; ½¹µãÏÒAB£½x1+x2+p; y1y2=£p, x1x2=ÆäÖÐA(x1,y1)¡¢B(x2,y2) ¢Ýͨ¾¶2p,½¹×¼¾à4p22
p;
4.ÏÒ³¤¹«Ê½£ºAB?1?k2?x2?x1?(1?k2)[(x1?x2)2?4x1x2]?1?12?y2?y1?(1?12)?[(y1?y2)2?4y1y2]£»
kk5¹ýÁ½µãÍÖÔ²¡¢Ë«ÇúÏß±ê×¼·½³Ì¿ÉÉèΪ£ºmx2?ny2?1 £¨m,nͬʱ´óÓÚ0ʱ±íʾÍÖÔ²£¬mn?0ʱ±íʾ˫ÇúÏߣ©£»
Ê®¶þÇóµ¼¹«Ê½¼°ÔËËã·¨Ôò¡£1.(c)'?0 2. (xn)'?nxn?1 3. (sinx)'?cosx 4. (cosx)'??sinx 11(lnx)'?(logx)?5.(ax)'?axlna 6. (ex)'?ex 7. a xx lna 8. uu'v?uv'()'?vv29. (u?v)'?u'?v' 10. (uv)'?u'v?uv' 11. 12. y?f(u),u?g(x),Ôòyx'?yu'ux'ÇúÏßy?f(x)ÔÚµãP(x0,f(x0))´¦ÇÐÏßµÄбÂÊk£½f/(x0)±íʾ¹ýÇúÏßy=f(x)ÉÏP(x0,f(x0))ÇÐÏßбÂÊ¡£ ¢Ù Ê®Èý.¸´ÊýµÄÏàµÈ a?bi?c?di?a?c,b?d.£¨a,b,c,d?R£© 22¸´Êýz?a?biµÄÄ££¨»ò¾ø¶ÔÖµ£© |z|=|a?bi|=a?b. Ê®ËÄ¡£ ·½²îS2?[(x1?x)2?(x2?x)2? nn????(xn?x)2]È¥¹À¼Æ×ÜÌå·½²î¡£¢ÇÑù±¾±ê×¼²îS?1[(x1?x)2?(x2?x)2?????(xn?x)2]=1?(x?x)225£¨Àíi1nni?1¿Æ£©¡¢
n!m!(n?m)!3.(Àí¿Æ)ÅÅÁÐÊý¹«Ê½:Anm?n(n?1)(n?m?1)?n?n!. (m?n,m,n?N*), AnmAnn?(n?1)???(n?m?1)0n?(m?n),Cn?Cn?1. ×éºÏÊý¹«Ê½£ºC?m!m?(m?1)?(m?2)???3?2?1mn×éºÏÊýÐÔÖÊ£ºCnm?Cnn?m£»Cnr?Cnr?1?Cnr?1.
4. (Àí¿Æ)¶þÏîʽ¶¨Àí£º
¢ÅÕÆÎÕ¶þÏîÕ¹¿ªÊ½µÄͨÏTr?1?Cnran?rbr(r?0,1,2,...,n)£» ¢Æ×¢ÒâµÚr£«1Ïî¶þÏîʽϵÊýÓëµÚr£«1ÏîϵÊýµÄÇø±ð.
ÒìÃæÖ±ÏßËù³É½Ç
cos??|cosa,b|=|a?b||a|?|b|?|x1x2?y1y2?z1z2|x?y?z?x2?y2?z2212121222 bËù³É½Ç£¬a,b·Ö±ð±íʾÒìÃæÖ±Ïßa,bµÄ·½ÏòÏòÁ¿£© £¨ÆäÖÐ?£¨0???90£©ÎªÒìÃæÖ±Ïßa,26¡¢Ö±ÏßABÓëƽÃæËù³É½Ç(??arcsinAB?mΪƽÃæ?µÄ·¨ÏòÁ¿). |AB||m|27¡¢.¶þÃæ½Ç??l??µÄƽÃæ½Ç ??arccosm?nm?n»ò??arccos£¨m£¬nΪƽÃæ?£¬?µÄ·¨ÏòÁ¿£©. |m||n||m||n|28¡¢.µãBµ½Æ½Ãæ?µÄ¾àÀë d?|AB?n|£¨nΪƽÃæ?µÄ·¨ÏòÁ¿£¬ABÊǾ¹ýÃæ?µÄÒ»ÌõбÏߣ¬A??£©. |n|11£»?dx£½lnx£«C£»?exdx£½xm?1£«C£¨m¡ÊQ£¬ m¡Ù£1£©
m?1x»ù±¾µÄ»ý·Ö¹«Ê½£º?0dx£½C£»?xmdx£½
xax£«C£»?cosxdx£½sinx£«C£»?sinxdx£½£cosx£«C£¨±íÖÐC¾ùΪ³£Êý£© adx£½lna5£®(Àí¿Æ)ÀëÉ¢ÐÔËæ»ú±äÁ¿µÄ·Ö²¼ÁÐ
Ò»°ãµØ£¬ÉèÀëÉ¢ÐÍËæ»ú±äÁ¿?¿ÉÄÜÈ¡µÃֵΪ£º
X1£¬X2£¬¡£¬X3£¬¡£¬
?ȡÿһ¸öÖµXi£¨I=1£¬2£¬¡£©µÄ¸ÅÂÊΪP£¨??xi)?P£¬Ôò³Æ±í
X1 X2 ¡ xi ¡ P P1 P2 ¡ Pi ¡ ΪËæ»ú±äÁ¿?µÄ¸ÅÂÊ·Ö²¼£¬¼ò³Æ?µÄ·Ö²¼ÁС£ Á½Ìõ»ù±¾ÐÔÖÊ£º¢Ùpi?0(i?1,2,¡)£»¢ÚP1+P2+¡=1¡£ 6£®¶ÀÁ¢Öظ´ÊÔÑ飺Èôn´ÎÖظ´ÊÔÑéÖУ¬Ã¿´ÎÊÔÑé½á¹ûµÄ¸ÅÂʶ¼²»ÒÀÀµÓÚÆäËû¸÷´ÎÊÔÑéµÄ½á¹û£¬Ôò³ÆÕân´ÎÊÔÑéÊǶÀÁ¢µÄ¡£ (1)Á½¸öÏ໥¶ÀÁ¢Ê¼þͬʱ·¢ÉúµÄ¸ÅÂÊ£¬µÈÓÚÿ¸öʼþ·¢ÉúµÄ¸ÅÂʵĻý£¬¼´P£¨A¡¤B£©=P£¨A£©¡¤P£¨B£©£»
(2)Èç¹ûÔÚÒ»´ÎÊÔÑéÖÐijʼþ·¢ÉúµÄ¸ÅÂÊΪP,ÄÇôÔÚn´Î¶ÀÁ¢Öظ´ÊÔÑéÖÐÕâ¸öʼþÇ¡ºÃ·¢Éúk´ÎµÄ¸ÅÂÊ£ºPn(k)=CPk(1£P)n-k¡£ 7£®Ëæ»ú±äÁ¿µÄ¾ùÖµºÍ·½²î kn£¨1£©Ëæ»ú±äÁ¿µÄ¾ùÖµE??x1p1?x2p2?¡£»·´Ó³Ëæ»ú±äÁ¿È¡ÖµµÄƽ¾ùˮƽ¡£
2£¨2£©ÀëÉ¢ÐÍËæ»ú±äÁ¿µÄ·½²î£ºD??(x1?E?)2p1?(x2?E?)2p2?¡?(xn?E?)pn?¡£»·´Ó³Ëæ»ú±äÁ¿
È¡ÖµµÄÎȶ¨Ó벨¶¯£¬¼¯ÖÐÓëÀëÉ¢µÄ³Ì¶È¡£
»ù±¾ÐÔÖÊ£ºE(a??b)?aE??b£»D(a??b)?a2D?¡£
8£®¼¸ÖÖÌØÊâµÄ·Ö²¼ÁÐ
£¨1£©Á½µã·Ö²¼£º¶ÔÓÚÒ»¸öËæ»úÊÔÑ飬Èç¹ûËüµÄ½á¹ûÖ»ÓÐÁ½ÖÖÇé¿ö£¬ÔòÎÒÃÇ¿ÉÓÃËæ»ú±äÁ¿
???¼×½á¹û·¢Éú,£¬À´ÃèÊöÕâ¸öËæ»úÊÔÑéµÄ½á¹û¡£Èç¹û¼×½á¹û·¢ÉúµÄ¸ÅÂÊΪ?1 ÒÒ½á¹û·¢Éú.?0 P£¬ÔòÒÒ½á¹û·¢ÉúµÄ¸ÅÂʱض¨
Ϊ1£P£¬¾ùֵΪE?=p£¬·½²îΪD?=p£¨1£p£©¡£
£¨2£©³¬¼¸ºÎ·Ö²¼:Öظ´½øÐжÀÁ¢ÊÔÑ飬ÿ´ÎÊÔÑéÖ»Óгɹ¦¡¢Ê§°ÜÁ½ÖÖ¿ÉÄÜ£¬Èç¹ûÿ´ÎÊÔÑé³É¹¦µÄ¸ÅÂÊΪp£¬Öظ´ÊÔÑéÖ±µ½³öÏÖÒ»´Î³É¹¦ÎªÖ¹£¬ÔòÐèÒªµÄÊÔÑé´ÎÊýÊÇÒ»¸öËæ»ú±äÁ¿£¬Óæαíʾ£¬Òò´Ëʼþ{¦Î£½n}±íʾ¡°µÚn´ÎÊÔÑé³É¹¦ÇÒÇ°n£1´ÎÊÔÑé¾ùʧ°Ü¡±¡£ËùÒÔP???n??p??1?p?n?1£¬Æä·Ö²¼ÁÐΪ£º
¦Î 1 2 ¡ n ¡ P p p(1£p) ¡ ¡ £¨3£©¶þÏî·Ö²¼:Èç¹ûÎÒÃÇÉèÔÚÿ´ÎÊÔÑéÖгɹ¦µÄ¸ÅÂʶ¼ÎªP£¬ÔòÔÚn´ÎÖظ´ÊÔÑéÖУ¬ÊÔÑé³É¹¦µÄ´ÎÊýÊÇÒ»¸öËæ»ú±äÁ¿£¬ÓæÎÀ´±íʾ£¬Ôò¦Î·þ´Ó¶þÏî·Ö²¼£®ÔòÔÚn´ÎÊÔÑéÖÐÇ¡ºÃ³É¹¦k´ÎµÄ¸ÅÂÊΪ£º
kP???k??Ck1?p?np?n?k. ¼Ç¦ÅÊÇn´Î¶ÀÁ¢Öظ´ÊÔÑéijʼþ·¢ÉúµÄ´ÎÊý£¬Ôò¦Å¡«B£¨n£¬p£©£» kpkqn?k(q?1?p,k?0,1,2,¡,n)¡£ÆÚÍûE¦Å=np£¬·½²îD¦Å=npq¡£ Æä¸ÅÂÊPn(k)?Cn9£®Õý̬·Ö²¼:Õý̬·Ö²¼ÃܶȺ¯Êý£ºf(x)?12??e?(x??)22?2£¬¾ùֵΪE¦Å=¦Ì£¬·½²îΪD???2¡£
Õý̬ÇúÏß¾ßÓÐÒÔÏÂÐÔÖÊ£º
£¨1£©ÇúÏßÔÚxÖáµÄÉÏ·½£¬ÓëxÖá²»Ïཻ¡£
£¨2£©ÇúÏß¹ØÓÚÖ±Ïßx =¦Ì¶Ô³Æ¡£