ÌâÄ¿ÄÚÈÝ
ÏÂͼÊÇ»¼¼×²¡£¨ÏÔÐÔ»ùÒòΪA£¬ÒþÐÔ»ùÒòΪa£©ºÍÒÒ²¡£¨ÏÔÐÔ»ùÒòΪB£¬ÒþÐÔ»ùÒòΪb£©Á½ÖÖÒÅ´«²¡µÄϵÆ×ͼ¡£¾Ýͼ»Ø´ð¡Ã
£¨1£©¼×²¡µÄÒÅ´«·½Ê½Îª______ȾɫÌå ÐÔÒÅ´«
£¨2£©Èô¢ò-5ÓëÁíÒ»Õý³£ÈË»éÅ䣬ÔòÆä×ÓÅ®»¼¼×²¡µÄ¸ÅÂÊΪ_______¡£
£¨3£©¼ÙÉè¢ò-1²»ÊÇÒÒ²¡»ùÒòµÄЯ´øÕߣ¬ÔòÒÒ²¡µÄÒÅ´«·½Ê½Îª_________________¡£¢ñ-2µÄ»ùÒòÐÍΪ__________£¬¢ó-2µÄ»ùÒòÐÍΪ__________¡£¼ÙÉè¢ó-1Óë¢ó-5½á»éÉúÁËÒ»¸öÄк¢£¬Ôò¸ÃÄк¢»¼Ò»ÖÖ²¡µÄ¸ÅÂÊΪ__________£¬ËùÒÔÎÒ¹ú»éÒö·¨½ûÖ¹½üÇ×¼äµÄ»éÅä¡£
£¨4£©Èô¢ó-1Óë¢ó-4ºÅ»éÅ䣬ÉúÓý×ÓÅ®ÖÐͬʱ»¼Á½ÖÖ²¡µÄ¸ÅÂÊΪ______£¬ Ö»»¼Ò»ÖÖ²¡µÄ¸ÅÂÊΪ________¡£
£¨1£©³£È¾É«Ìå¡¢ÏÔÐÔ£» £¨2£©1/2 £»
£¨3£©XȾɫÌåÒþÐÔÒÅ´« aaXbY AaXbY 1/4£»
£¨4£©1/12 5/8£»
¡¾½âÎö¡¿£¨1£©¢ò5¡¢¢ò6»¼¼×²¡£¬¢ó3²»»¼¼×²¡£¬¿ÉÅжϼײ¡Êdz£È¾É«ÌåÏÔÐÔÒÅ´«¡£
£¨2£©¢ò5»ùÒòÐÍΪAa£¬ÓëÒ»Õý³£ÈË£¨aa£©»éÅ䣬×ÓÅ®»¼¼×²¡£¨A_£©µÄ¸ÅÂÊΪ1/2¡£
£¨3£©ÓÉÓÚ¢ò-1²»ÊÇÒÒ²¡»ùÒòµÄЯ´øÕߣ¬ËùÒÔÒÒ²¡ÊÇXȾɫÌåÒþÐÔÒÅ´«¡£¢ñ2»¼ÒÒ²¡£¬»ùÒòÐÍΪaaXbY£»ÓÉÓÚ¢ò1²»»¼¼×²¡£¬¢ó-2»¼Á½ÖÖ²¡£¬ËùÒÔ»ùÒòÐÍΪAaXbY¡£¢ó1Õý³££¬»ùÒòÐÍΪ1/2aaXBXB¡¢1/2aaXBXb£¬¢ó5»ùÒòÐÍΪaaXBY£¬¶þÕß»éÅ䣬ÉúÒ»¸öÄк¢£¬Ö»»¼¼×²¡£¨A_XBY£©ºÍÖ»»¼ÒÒ²¡£¨aaXbY£©µÄ¸ÅÂÊΪ0¡Á3/4+1¡Á1/4=1/4¡£
£¨4£©¢ó4»¼¼×²¡£¬»ùÒòÐÍΪ1/3AAXBY¡¢2/3AaXBY£»¢ó1»ùÒòÐÍΪ1/2aaXBXB¡¢1/2aaXBXb£¬¶þÕß»éÅäÉúÓýÒ»¸ö»¼Á½ÖÖ²¡£¨A_XbY£©µÄ¸ÅÂÊΪ2/3¡Á1/8£½1/12£¬Õý³££¨aaXB_£©µÄ¸ÅÂÊΪ1/3¡Á7/8=7/24£¬Ö»»¼Ò»ÖÖ²¡µÄ¸ÅÂÊΪ1¨D1/12¨D7/24£½5/8¡£