ÌâÄ¿ÄÚÈÝ
£¨12·Ö£©¿Æѧ¼ÒÔÚÑо¿¹ûӬʱ£¬·¢ÏÖ¹ûÓ¬µÄÑÛÉ«ÖÐÓкìÉ«¡¢ºÖÉ«¡¢°×É«ÈýÖÖ±íÏÖÐÍ£¬ÉíÉ«ÓлÒÉí¡¢ºÚÉíÁ½ÖÖ±íÏÖÐÍ¡£
£¨1£©¹ûÓ¬ÊÇXYÐÍÐÔ±ð¾ö¶¨µÄÉúÎÌåϸ°ûÖÐȾɫÌåÊýΪ2N£½8Ìõ¡£Èç¹û¶Ô¹ûÓ¬µÄ»ùÒò×é½øÐвâÐò£¬ÐèÒª²âÁ¿ ÌõȾɫÌå¡£
(2)Èô¼ÙÉè¿ØÖƹûÓ¬ÑÛÉ«A£¨a£©ÓëÉíÉ«B£¨b£©»ùÒòλÓÚÔÚÁ½¶Ô³£È¾É«ÌåÉÏ¡£ÓÐÈ˽«Á½Ö»¹ûÓ¬ÔÓ½»£¬»ñµÃÁËl00¸öÌå¡£Æä±íÏÖÐÍΪ37Ö»»ÒÉíºÖÉ«ÑÛ£»l9Ö»»ÒÉí°×ÑÛ£»l8Ö»»ÒÉíºìÑÛ£»l3Ö»ºÚÉíºÖÉ«ÑÛ£»7Ö»ºÚÉíºìÑÛ£»6Ö»ºÚÉí°×ÑÛ¡£ÔòÁ½¸öÇ×±¾µÄ»ùÒòÐÍÊÇ ¡£Èç¹û¸ÃÈ˽øÐеÄÔÓ½»ÊµÑé¹ûÓ¬Ëù²ú°×ÑÛ¹ûÓ¬ÅßÌ¥ÖÂËÀ£¬ÔòÀíÂÛÉÏÇ×´úÁ½Ö»¹ûÓ¬ÔÓ½»ºó´úµÄ±íÏÖÐͼ°±ÈÀýΪ ¡£
£¨3£©Èô¿ØÖÆÑÛÉ«µÄ»ùÒòÓÉÁ½¶ÔλÓÚ³£È¾É«ÌåÉϵĵÈλ»ùÒò¿ØÖÆ£¨×ñÑ»ùÒòµÄ×ÔÓÉ×éºÏ¶¨ÂÉ£©£¬ÆäÖÐC_DDΪºìÑÛ£¬C_DdΪºÖÉ«ÑÛ£¬ÆäËü»ùÒòÐ;ù±íÏÖ°×ÑÛ£¬ÏÖÓÐCcDdÁ½Ö»´ÆÐÛ¹ûÓ¬ÔÓ½»£¬Ëù²úÉúF1´ú¹ûÓ¬µÄ±íÏÖÐͼ°±ÈÀýΪ ,ÈôÔÙÈÃF1´úÖкÖÉ«Ñ۵ĸöÌå×ÔÓɽ»Å䣬Ôò×Ó´úµÄ±íÏÖÐͼ°±ÈÀýΪ ¡£
£¨4£©ÈôÒÑÖª»ÒÉíÊÇλÓÚXȾɫÌåÉÏÏÔÐÔÐÔ×´£¬ÓÐÈ˽øÐÐʵÑéÈô¿ºÏ»ÒÉí´Æ¹ûÓ¬ºÍºÚÉíÐÛ¹ûÓ¬ÔÓ½»£¬F1´ÆÐÛ¹ûÓ¬Ï໥½»ÅäµÃF2£¬ÔÙÈÃF2´ú´ÆÐÛ¹ûÓ¬Ï໥½»ÅäµÃF3£¬ÔòF3´úÖÐÐÛÐÔ¹ûÓ¬µÄ±íÏÖÐͼ°±ÈÀý ¡£
(1)5£¨2·Ö£© (2)AaBbºÍAaBb(2·Ö) »Òºì£º»ÒºÖ£ººÚºì£ººÚºÖ=3£º6£º1£º2£¨2·Ö£©£¨Ë³Ðò¿ÉÒԵߵ¹£©(3)ºìÑÛ¡¢ºÖÑÛ¡¢°×ÑÛ=3:6:7£¨2·Ö£© ºìÑÛ¡¢ºÖÑÛ¡¢°×ÑÛ-2£º4£º3(2·Ö) (4)»ÒÉí£ººÚÉí=3£º1 £¨2·Ö£©
¡¾½âÎö¡¿
ÊÔÌâ·ÖÎö£º£¨1£©¹ûÓ¬ÊÇXYÐÍÐÔ±ð¾ö¶¨µÄÉúÎӦ¸Ã²â¶¨3Ìõ³£È¾É«ÌåºÍX¡¢Y2ÌõÐÔȾɫÌ岡ÉϵĻùÒò¡£(2)¸ù¾ÝÁ½Ö»¹ûÓ¬ÔÓ½»ºó´úµÄ±íÏÖÐͼ°±ÈÀý·ÖÎö£º»Ò£ººÚ=3:1,
ºìÑÛ£ººÖÉ«ÑÛ£º°×ÑÛ =1:2:1£¬ÔòÁ¿Ç×±¾µÄ»ùÒòÐÍÊÇAaBbºÍAaBb¡£°×ÑÛÑÛ¹ûÓ¬ÅßÌ¥ÖÂËÀ£¬Ôòºó´úΪ37Ö»»ÒÉíºÖÉ«ÑÛ£ºl8Ö»»ÒÉíºìÑÛ£ºl3Ö»ºÚÉíºÖÉ«ÑÛ£º7Ö»ºÚÉíºìÑÛ£¬±ÈÀýԼΪ6:3:2:1¡£ (3)ÓÉÌâÒâ¿ÉÖªCcDdÁ½Ö»´ÆÐÛ¹ûÓ¬ÔÓ½»£¬ºó´úC_DDºìÑÛ3/16, C_DdºÖÉ«ÑÛ6/16,ccD-¡¢ccdd¡¢C_dd¶¼ÊÇ°×É«£¬Õ¼7/16¡££¨4£©ÓÉÌâÒâд³öÇ×±¾»ùÒòÐÍΪXDXD
ºÍ XdYF1ΪXDXd»ÒÉí
ºÍ XDY»ÒÉí
F2 XDXd»ÒÉí£ºXDXD»ÒÉí£º XDY»ÒÉí£ºXdYºÚÉí=1:1:1:1£¬¼´»ÒÉí£ººÚÉí=3£º1
¿¼µã£º±¾ÌâÖ÷Òª¿¼²é°éÐÔÒÅ´«£¬»ùÒòÐͺͱíÏÖÐ͵ȿ¼µãµÄÀí½â,ÒâÔÚ¿¼²é¿¼ÉúÀí½âËùѧ֪ʶµÄÒªµã, °ÑÎÕ֪ʶ¼äµÄÄÚÔÚÁªÏµµÄÄÜÁ¦¡£
![](http://thumb2018.1010pic.com/images/loading.gif)