Question

16£®Ä³Í¬Ñ§ÀûÓÃͼ¼×ËùʾװÖã¬ÔÚɳͰ£¨º¬É³£©µÄ×ÜÖÊÁ¿Ô¶Ð¡ÓÚС³µµÄÖÊÁ¿µÄÌõ¼þÏ£¬Í¨¹ý¸Ä±äС³µµÄÖÊÁ¿£¬Ì½°´Ð¡³µ¼ÓËÙ¶ÈÓëÆäÖÊÁ¿µÄ¹Øϵ£®

£¨1£©ÎªÁËƽºâĦ²ÁÁ¦£¬Ð轫³¤Ä¾°åµÄÓҶ˵æ¸ß£¬ÔÚûÓУ¨Ìî¡°ÓС±»ò¡°Ã»ÓС±£©É³Í°Í϶¯µÄÇé¿öÏ£¬ÇáÍÆÒ»ÏÂС³µ£¬Ê¹Ð¡³µÄÜÍ϶¯´©¹ý¼ÆʱÆ÷µÄÖ½´ø×öÔÈËÙÖ±ÏßÔ˶¯£®
£¨2£©Ä³´ÎʵÑé´ò³öµÄÖ½´øÈçͼÒÒËùʾ£¬OΪÆðµã£¬A¡¢B¡¢CΪÈý¸öÏàÁڵļÆÊýµã£¬Ã¿ÏàÁÚÁ½¸ö¼ÆÊýµãÖ®¼ä»¹ÓÐÒ»¸öµãδ±ê³ö£¬A¡¢B¡¢Cµ½OµãµÄ¾àÀëÔÚͼÖÐÒѱê³ö£¬ËùÓý»±äµçÁ÷µÄƵÂÊΪf£¬Ôò²âµÃС³µÔ˶¯µÄ¼ÓËٶȴóСa=$\frac{£¨{s}_{1}+{s}_{3}-2{s}_{2}£©{f}^{2}}{4}$£®£¨ÇëÓÃÌâ¸É¼°Í¼ÒÒÖеÄ×Öĸ±íʾ£©

Answer 1

·ÖÎö £¨1£©Æ½ºâĦ²ÁÁ¦Ê±£¬²»Äܽ«É³Í°Í¨¹ý¶¨»¬ÂÖ¹ÒÔÚС³µÉÏ£®
£¨2£©¸ù¾ÝÁ¬ÐøÏàµÈʱ¼äÄÚµÄλÒÆÖ®²îÊÇÒ»ºãÁ¿Çó³öС³µµÄ¼ÓËٶȣ®

½â´ð ½â£º£¨1£©ÎªÁËƽºâĦ²ÁÁ¦£¬Ð轫³¤Ä¾°åµÄÓҶ˵æ¸ß£¬ÔÚûÓÐɳͰÍ϶¯µÄÇé¿öÏ£¬ÇáÍÆÒ»ÏÂС³µ£¬Ê¹Ð¡³µÄÜÍ϶¯´©¹ý¼ÆʱÆ÷µÄÖ½´ø×öÔÈËÙÖ±ÏßÔ˶¯£®
£¨2£©¸ù¾Ý$£¨{s}_{3}-{s}_{2}£©-£¨{s}_{2}-{s}_{1}£©=a£¨2T£©^{2}$µÃ¼ÓËÙ¶ÈΪ£º
a=$\frac{£¨{s}_{1}+{s}_{3}-2{s}_{2}£©}{4{T}^{2}}$=$\frac{£¨{s}_{1}+{s}_{3}-2{s}_{2}£©{f}^{2}}{4}$£®
¹Ê´ð°¸Îª£º£¨1£©Ã»ÓУ¬£¨2£©$\frac{£¨{s}_{1}+{s}_{3}-2{s}_{2}£©{f}^{2}}{4}$£®

µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÕÆÎÕƽºâĦ²ÁÁ¦µÄ·½·¨£¬ÒÔ¼°Ö½´øµÄ´¦Àí£¬»áͨ¹ýÖ½´øÇó½â˲ʱËٶȺͼÓËٶȣ¬¹Ø¼üÊÇÔȱäËÙÖ±ÏßÔ˶¯ÍÆÂÛµÄÔËÓã®