ÌâÄ¿ÄÚÈÝ
Èçͼ£¬·½¸ñÖ½ÖеÄÿ¸öС·½¸ñ¶¼ÊDZ߳¤Îª1¸öµ¥Î»³¤¶ÈµÄÕý·½ÐΣ¬¡÷ABCµÄ¶¥
µã¶¼ÔÚ¸ñµãÉÏ£¬½¨Á¢Æ½ÃæÖ±½Ç×ø±êϵ£®
(1)µãAµÄ×ø±êΪ £¬µãCµÄ×ø±êΪ £®
(2)½«¡÷ABCÏò×óƽÒÆ7¸öµ¥Î»£¬Ç뻳öƽÒƺóµÄ¡÷A1B1C1£®ÈôMΪ¡÷ABCÄÚµÄÒ»µã£¬Æä×ø±êΪ(a£¬b)£¬ÔòƽÒƺóµãMµÄ¶ÔÓ¦µãM1µÄ×ø±êΪ £®
(3)ÒÔÔµãOΪλËÆÖÐÐÄ£¬½«¡÷ABCËõС£¬Ê¹±ä»»ºóµÃµ½µÄ¡÷A2B2C2Óë¡÷ABC¶ÔÓ¦±ßµÄ±ÈΪ1¡Ã2£®ÇëÔÚÍø¸ñÄÚ»³ö¡÷A2B2C2£¬²¢Ð´³öµãA2µÄ×ø±ê£º £®
¡¾´ð°¸¡¿
½â£º£¨1£©£¨2,8£© £¨6,6£©Èçͼ£º£¨2£©£¨£© £¨3£©()
¡¾½âÎö¡¿ÂÔ
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿