ÌâÄ¿ÄÚÈÝ
NBA×ܾöÈü²ÉÓÃ7³¡4ʤÖÆ£¬¼´Èôij¶ÓÏÈȡʤ4³¡Ôò±ÈÈü½áÊø£®ÓÉÓÚNBAÓÐÌØÊâµÄÕþ²ßºÍ¹æÔò£¬ÄܽøÈë¾öÈüµÄÇò¶ÓʵÁ¦¶¼½ÏÇ¿£¬Òò´Ë¿ÉÒÔÈÏΪ£¬Á½¸ö¶ÓÔÚÿһ³¡±ÈÈüÖÐȡʤµÄ¸ÅÂÊÏàµÈ£®¸ù¾Ý²»Íêȫͳ¼Æ£¬Ö÷°ìÒ»³¡¾öÈü£¬×éÖ¯ÕßÓÐÍûͨ¹ý³öÊÛµçÊÓת²¥È¨¡¢ÃÅƱ¼°ÁãÊÛÉÌÆ·¡¢Í£³µ·Ñ¡¢¹ã¸æ·ÑµÈÊÕÈë»ñÈ¡ÊÕÒæ2 000ÍòÃÀÔª£¨Ï൱ÓÚÀºÇò¾ÞÐǿƱȵÄÄêн£©£®£¨1£©ÇóËùÐè±ÈÈü³¡ÊýXµÄ¸ÅÂÊ·Ö²¼£»
£¨2£©Çó×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍû£®
·ÖÎö£º£¨1£©ËùÐè±ÈÈü³¡ÊýXÊÇËæ»ú±äÁ¿£¬ÆäËùÓпÉÄÜȡֵΪ4£¬5£¬6£¬7£¬¸ù¾ÝÁ½¸ö¶ÓÔÚÿһ³¡±ÈÈüÖÐȡʤµÄ¸ÅÂÊÏàµÈ£¬µÃµ½±äÁ¿ ·ûºÏ¶ÀÁ¢Öظ´ÊÔÑ飬¸ù¾Ý¶ÀÁ¢Öظ´ÊÔÑéµÄ¸ÅÂʹ«Ê½Ð´³ö·Ö²¼ÁУ®
£¨2£©¸ù¾ÝÉÏÒ»ÎÊ×ö³öµÄXµÄ·Ö²¼ÁУ¬Ð´³öÆÚÍûµÄ±íʾʽ£¬×ö³ö½á¹û£¬¸ù¾ÝÒ»³¡ÊÕÈë»ñÈ¡ÊÕÒæ2 000ÍòÃÀÔª£¬µÃµ½×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍû£®
£¨2£©¸ù¾ÝÉÏÒ»ÎÊ×ö³öµÄXµÄ·Ö²¼ÁУ¬Ð´³öÆÚÍûµÄ±íʾʽ£¬×ö³ö½á¹û£¬¸ù¾ÝÒ»³¡ÊÕÈë»ñÈ¡ÊÕÒæ2 000ÍòÃÀÔª£¬µÃµ½×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍû£®
½â´ð£º½â£º£¨1£©ËùÐè±ÈÈü³¡ÊýXÊÇËæ»ú±äÁ¿£¬ÆäËùÓпÉÄÜȡֵΪ4£¬5£¬6£¬7£¬
Á½¸ö¶ÓÔÚÿһ³¡±ÈÈüÖÐȡʤµÄ¸ÅÂÊÏàµÈ£¬
´Ó¶øP£¨X=k£©=
(
)k-1£¬k=4£¬5£¬6£¬7£®
¡àXµÄ¸ÅÂÊ·Ö²¼Îª
£¨2£©ËùÐè±ÈÈü³¡ÊýµÄÊýѧÆÚÍûÊÇE(X)=4¡Á
+5¡Á
+6¡Á
+7¡Á
=
×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍûΪ
¡Á2000=11625ÍòÃÀÔª£®
Á½¸ö¶ÓÔÚÿһ³¡±ÈÈüÖÐȡʤµÄ¸ÅÂÊÏàµÈ£¬
´Ó¶øP£¨X=k£©=
C | 3 k-1 |
1 |
2 |
¡àXµÄ¸ÅÂÊ·Ö²¼Îª
¦Î | 4 | 5 | 6 | 7 | ||||||||
P |
|
|
|
|
1 |
8 |
1 |
4 |
5 |
16 |
5 |
16 |
93 |
16 |
×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍûΪ
93 |
16 |
µãÆÀ£º±¾Ì⿼²éÀëÉ¢ÐÍËæ»ú±äÁ¿µÄ·Ö²¼ÁкÍÆÚÍû£¬ÇóÀëÉ¢ÐÍËæ»ú±äÁ¿µÄ·Ö²¼ÁкÍÆÚÍûÊǽüÄêÀ´Àí¿Æ¸ß¿¼±Ø³öµÄÒ»¸öÎÊÌ⣬ÌâÄ¿×öÆðÀ´²»ÄÑ£¬ÔËËãÁ¿Ò²²»´ó£¬µ«ÊÇҪעÒâ½âÌâ¸ñʽ£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿