Question

½â´ðÌâ ÒÑÖª¶þ´Îº¯Êýf(x)£½ax2£«bx£«c£¬Âú×ãf(0)£½f(x)£½0£¬ÇÒf(x)µÄ×îСֵÊÇ£® (1) Çóf(x)µÄ½âÎöʽ£» (2) ÉèÖ±Ïßl¡Ãy£½t2£­t(ÆäÖÐ0£¼t£¼£¬tΪ³£Êý)£¬ÈôÖ±ÏßlÓëf(x)µÄͼÏóÒÔ¼°yÖáÕâ¶þÌõÖ±ÏߺÍÒ»ÌõÇúÏßËùΧ³É·â±ÕͼÐεÄÃæ»ýÊÇS1(t)£¬Ö±ÏßlÓëf(x)µÄͼÏóÒÔ¼°Ö±ÏßÕâ¶þÌõÖ±ÏߺÍÒ»ÌõÇúÏßËùΧ³É·â±ÕͼÐεÄÃæ»ýÊÇS2(t)£¬ÒÑÖª£¬µ±g(t)È¡×îСֵʱ£¬ÇótµÄÖµ£® (3) ÒÑÖªm¡Ý0£¬n¡Ý0£¬ÇóÖ¤£º£®

Answer 1

´ð°¸£º
½âÎö£º

(1)	½â£ºÓɶþ´Îº¯ÊýͼÏóµÄ¶Ô³ÆÐÔ£¬¿ÉÉ裬ÓÖ ¹Ê¡­¡­¡­¡­¡­¡­¡­3·Ö
(2)	½â£º¾ÝÌâÒ⣬ֱÏßÓëµÄͼÏóµÄ½»µã×ø±êΪ£¬Óɶ¨»ý·ÖµÄ¼¸ºÎÒâÒåÖª ¡­¡­¡­5·Ö £½ £½¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­7·Ö ¶ø Áî»ò(²»ºÏÌâÒ⣬ÉáÈ¥) µ±¡­¡­¡­¡­¡­8·Ö ¹Êµ±Ê±£¬ÓÐ×îСֵ£®¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­9·Ö
(3)	½â£ºµÄ×îСֵΪ ¡­¡­¢Ù¡­¡­¢Ú¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­11·Ö ¢Ù£«¢ÚµÃ£º¡­¡­¡­¢Û ÓÖ¡­¡­¡­¡­¡­¡­¡­12·Ö ÓɾùÖµ²»µÈʽºÍ¢ÛÖª£º ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­13·Ö ¹Ê¡­¡­14·Ö