Áí¹ç | ¥Ë¥å¡¼¥¹ | ʸ²½ | ¼Ò²ñ | ²ñ¼Ò¿¦¶È | ³ØÌä | ²ÈÅÅ | À¯¼£·ÐºÑ | ¿© | ¥¹¥Ý¡¼¥Ä | ¥²¡¼¥à | ¿´¤ÈÂÎ | PCÅù | ¥Í¥Ã¥È | Âç¿Í | ±¿±Ä | ¥Í¥¿ | ·Ýǽ | ²»³Ú | ¸ä³Ú | ¥¢¥Ë¥á | | | ¤¤Ã¤Á¤ê | ¤Ò¤Ã¤Ñ¤ê | ¥¯¥í¥¹ | ¸ÄÊÌ·ë²Ì |
ID:BhKKk2ES7y (¡¦¢Ï¡¦)Ž²Ž²!! (6)
¡Öº£ÅÙ¤ÏÆñ¤·¤¤¤è¡×#95411¤Ç¡Ö8¡×¤ÈÅú¤¨¤¿Êý¤Ø¤Î¼ÁÌä¤Ç¤·¤¿¡£
Àµ²ò¤Ï8¤Ç¤¹¡£
f(x)=x^3-3x^2+1¤È¤ª¤¯¤È¡¢¡¡f(-2/3)<0,f(0)>0,f(2/3)<0,f(3)>0¤è¤ê¡¢
f(x)=0¤Ï°Û¤Ê¤ë3¤Ä¤Î¼Â¿ô²ò¤ò¤â¤Á¡¢¤½¤ì¤é¤ò¦Á,¦Â,¦Ã(¦Á>¦Â>¦Ã,a=¦Á)¤È¤ª¤¯¤È¡¢
-2/3<¦Ã<0<¦Â<2/3<¦Á<3¤Ç¤¢¤ë¡£
¤Þ¤¿²ò¤È·¸¿ô¤Î´Ø·¸¤è¤ê¦Á+¦Â+¦Ã=3,¦Á¦Â+¦Â¦Ã+¦Ã¦Á=0,¦Á¦Â¦Ã=-1
¤³¤³¤ÇS(n)=¦Á^n+¦Â^n+¦Ã^n(n=0,1,2,¡¦¡¦¡¦)¤È¤ª¤¯¤È
S(0)=3,S(1)=¦Á+¦Â+¦Ã=3,S(2)=(¦Á+¦Â+¦Ã)^2-2(¦Á¦Â+¦Â¦Ã+¦Ã¦Á)=9
¦Á,¦Â,¦Ã¤Ïx^3-3x^2+1=0¤Î²ò¤À¤«¤é
¡¦¦Á^(n+3)-3¦Á^(n+2)+¦Á^n=0
¡¦¦Â^(n+3)-3¦Â^(n+2)+¦Â^n=0
¡¦¦Ã^(n+3)-3¦Ã^(n+2)+¦Ã^n=0
¤è¤Ã¤ÆS(n+3)-3S(n+2)+S(n)=0
°Ê¾å¤Î¤³¤È¤«¤é¡¢£¹¤Ç³ä¤Ã¤¿Í¾¤ê¤¬Æ±¤¸À°¿ôƱ»Î¤ò¢á¤ò»È¤Ã¤Æɽ¤¹¤È¡ÊÎ㤨¤Ð2¢á11,14¢á23¤Ç¤¢¤ë¡Ë
S(0)¢á3,S(1)¢á3,S(2)¢á0,S(3)¢á6,S(4)¢á6,S(5)¢á0,S(6)¢á3,S(7)¢á3,S(8)¢á0,¡¦¡¦¡¦
¤È¤Ê¤ê¡¢¼þ´ü£¶¤Ç·«¤êÊÖ¤¹¤³¤È¤¬Ê¬¤«¤ë¡£
1994=332¡ß6+2¤À¤«¤é¡¢S(1994)¢áS(2)¢á0¤Ç¤¢¤ë¡£
|¦Â|<2/3,|¦Ã|¡ã2/3¤è¤ê¡¢0<¦Â^2+¦Ã^2<1(|x|¤Ï£ø¤ÎÀäÂÐÃͤòɽ¤¹)
¤è¤Ã¤Æ0<¦Â^1994+¦Ã^1994<¦Â^2+¦Ã^2<1
¤À¤«¤é¦Á¤ÎÀ°¿ôÉôʬ=(S(1994)-¦Â^1994-¦Ã^1994)¤ÎÀ°¿ôÉôʬ¢á-1¢á8
¤è¤Ã¤Æµá¤á¤ëÅú¤¨¤Ï8¤Ç¤¢¤ë¡£
¤¢¤Ê¤¿¤Ï¤É¤¦¤ä¤Ã¤ÆÀµ²ò¤Ë¤¿¤É¤êÃ夤ޤ·¤¿¤«¡©
1 | ÃΤäƤ¿ | 2 | (6.1%) |
2 | ·×»»¤·¤¿¡Ê¾ÚÌÀ¤·¤¿¡Ë | 9 | (27.3%) |
3 | ¥°¥°¤Ã¤¿ | 0 | |
4 | ŬÅö | 21 | (63.6%) |
5 | ¤â¤ê¤¿¤Ý | 1 | (3%) |
̵»ë | 0 |
ËÀ¥°¥é¥Õ¤Þ¤¿¤Ïº¸¤ÎÈÖ¹æ¤ò¥¯¥ê¥Ã¥¯¤¹¤ë¤È¤½¤Î¹àÌܤò¸µ¤Ë¤·¤¿¤·¤Ã¤«¤ê¥¢¥ó¥±¡¼¥È¤¬ºî¤ì¤Þ¤¹¡£
²óÅúÉÑÅÙ¡¢¾Êά¤µ¤ì¤¿ÁªÂò»è¤ÎÁ´É½¼¨¡¢¤Ê¤É¤Î¾ÜºÙɽ¼¨
¹ç·×²óÅú¿ô: 33¿Í / 33¸Ä
¤³¤Î¥¢¥ó¥±¡¼¥È¤ÈǯÎð¡¢ÀÊÌ¡¢½Ð¿ÈÅÔÆ»Éܸ©¡¢µï½»ÅÔÆ»Éܸ©¤Ç¤Î¥¯¥í¥¹½¸·×¤ò¸«¤ë Tweet
¤³¤Î¥¢¥ó¥±¡¼¥È¤Ø¤Ï¸½ºß¥È¥é¥Ã¥¯¥Ð¥Ã¥¯¤Ç¤¤Þ¤»¤ó¡£