ÌâÄ¿ÄÚÈÝ

ÒÑÖªÊýÁÐ{an}Âú×㣺a1£«£«£«¡­£«£½n2£«2n(ÆäÖг£Êý¦Ë£¾0£¬n¡ÊN*)

(1)ÇóÊýÁÐ{an}µÄͨÏʽ£»

(2)µ±¦Ë£½4ʱ£¬ÊÇ·ñ´æÔÚ»¥²»ÏàͬµÄÕýÕûÊýr£¬s£¬t£¬Ê¹µÃar£¬as£¬at³ÉµÈ±ÈÊýÁУ¿Èô´æÔÚ£¬¸ø³ör£¬s£¬tÂú×ãµÄÌõ¼þ£»Èô²»´æÔÚ£¬ËµÃ÷ÀíÓÉ£»

(3)ÉèSnΪÊýÁÐ{an}µÄǰnÏîºÍ£¬Èô¶ÔÈÎÒân¡ÊN*£¬¶¼ÓÐ(1£­¦Ë)Sn£«¦Ëan¡Ý2¦Ënºã³ÉÁ¢£¬ÇóʵÊý¦ËµÄȡֵ·¶Î§£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø