£¨1£©ÈôCµÄ·½³ÌΪ£®µãP1£¨3£¬0£©¼°S3=162£¬ÇóµãP3µÄ×ø±ê£»£¨Ö»Ðèд³öÒ»¸ö£©
£¨2£©ÈôCµÄ·½³ÌΪy2=2px(p¹0)£®µãP1(0£¬0)£¬¶ÔÓÚ¸ø¶¨µÄ×ÔÈ»Êýn£¬Ö¤Ã÷£º£¨x1+p£©2£¬(x2+p)2£¬¡£¬£¨xn+p£©2³ÉµÈ²îÊýÁУ»
£¨3£©ÈôCµÄ·½³ÌΪ£®µãP1(a£¬0)£¬¶ÔÓÚ¸ø¶¨µÄ×ÔÈ»Êýn£¬µ±¹«²îd±ä»¯Ê±£¬ÇóSnµÄ×îСֵ£®
Ä꼶 | ¸ßÖÐ¿Î³Ì | Ä꼶 | ³õÖÐ¿Î³Ì |
¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ |
¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍƼö£¡ |
¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍƼö£¡ |
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£ºÖÐѧ½Ì²Ä±ê׼ѧ°¸¡¡Êýѧ¡¡¸ß¶þÉϲá ÌâÐÍ£º044
ÉèP1(x1£¬y1)£¬P2(x2£¬y2)£¬¡£¬Pn(xn£¬yn)(n¡Ý3£¬n¡ÊN)ÊǶþ´ÎÇúÏßCÉϵĵ㣬ÇÒa1£½|OP1|2£¬a2£½|OP2|2£¬¡£¬an£½|OPn|2¹¹³ÉÁËÒ»¸ö¹«²îΪd(d¡Ù0)µÄµÈ²îÊýÁУ¬ÆäÖÐOÊÇ×ø±êԵ㣮¼ÇSn£½a1£«a2£«¡£«an£®
(1)ÈôCµÄ·½³ÌΪ£y2£½1£¬n£½3£®µãP1(3£¬0)¼°S3£½162£¬ÇóµãP3µÄ×ø±ê£»(Ö»Ðèд³öÒ»¸ö)
(2)ÈôCµÄ·½³ÌΪy2£½2px(p¡Ù0)£®µãP1(0£¬0)£¬¶ÔÓÚ¸ø¶¨µÄ×ÔÈ»Êýn£¬Ö¤Ã÷£º(x1£«p)2£¬(x2£«p)2£¬¡£¬(xm£«p)2³ÉµÈ²îÊýÁУ»
(3)ÈôCµÄ·½³ÌΪ£«£½1(a£¾b£¾0)£®µãP1(a£¬0)£¬¶ÔÓÚ¸ø¶¨µÄ×ÔÈ»Êýn£¬µ±¹«²îd±ä»¯Ê±£¬ÇóSnµÄ×îСֵ£®
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º044
ÉèP1(x1£¬y1)£¬P1(x2£¬y2)£¬¡£¬Pn(xn£¬yn)(n³3£¬nÎN)ÊǶþ´ÎÇúÏßCÉϵĵ㣬ÇÒ¹¹³ÉÁËÒ»¸ö¹«²îd(d¹0)µÄµÈ²îÊýÁУ¬ÆäÖÐOÊÇ×ø±êԵ㣮¼ÇSn=a1+a2+¡+an£®
£¨1£©ÈôCµÄ·½³ÌΪ£®µãP1£¨3£¬0£©¼°S3=162£¬ÇóµãP3µÄ×ø±ê£»£¨Ö»Ðèд³öÒ»¸ö£©
£¨2£©ÈôCµÄ·½³ÌΪy2=2px(p¹0)£®µãP1(0£¬0)£¬¶ÔÓÚ¸ø¶¨µÄ×ÔÈ»Êýn£¬Ö¤Ã÷£º£¨x1+p£©2£¬(x2+p)2£¬¡£¬£¨xn+p£©2³ÉµÈ²îÊýÁУ»
£¨3£©ÈôCµÄ·½³ÌΪ£®µãP1(a£¬0)£¬¶ÔÓÚ¸ø¶¨µÄ×ÔÈ»Êýn£¬µ±¹«²îd±ä»¯Ê±£¬ÇóSnµÄ×îСֵ£®
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£º ÌâÐÍ£º
ÉèP1(x1£¬y1)ÊÇÖ±Ïßl£ºf(x£¬y)£½0ÉÏÒ»µã£¬P2(x2£¬y2)ÊDz»ÔÚÖ±ÏßlÉϵĵ㣬Ôò·½³Ìf(x£¬y)£«f(x1£¬y1)£«f(x2£¬y2)£½0Ëù±íʾµÄÖ±ÏßÓëlµÄ¹ØϵÊÇ(¡¡¡¡)
A£®Æ½ÐÐ B£®ÖغÏ
C£®Ïཻ D£®Î»ÖùØϵ²»È·¶¨
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÊýѧ À´Ô´£ºÉϺ£¸ß¿¼ÕæÌâ ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
°Ù¶ÈÖÂÐÅ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com