Question

9£®Í㶹ÖÖ×ÓµÄ×ÓÒ¶»ÆÉ«ºÍÂÌÉ«·Ö±ðÓÉ»ùÒòYºÍy¿ØÖÆ£¬ÐÎ×´Ô²Á£ºÍÖåÁ£·Ö±ðÓÉ»ùÒòRºÍr¿ØÖÆ£®¿Æ¼¼Ð¡×éÔÚ½øÐÐÒÅ´«ÊµÑé¹ý³ÌÖУ¬ÓûÆÉ«Ô²Á£ºÍÂÌÉ«Ô²Á£½øÐÐÔÓ½»£¬·¢ÏÖºó´ú³öÏÖËÄÖÖ±íÏÖÀàÐÍ£¬¶Ôÿ¶ÔÐÔ×´×÷³öͳ¼Æ£¬½á¹ûÈçͼËùʾ£®Çë»Ø´ð£º
£¨1£©Í㶹ÿ¶ÔÏà¶ÔÐÔ×´µÄÒÅ´«·ûºÏ»ùÒò·ÖÀ붨ÂÉ£®
£¨2£©Ç×±¾µÄÒÅ´«Òò×Ó×é³ÉΪYyRr¡¢yyRr£®
£¨3£©ºó´úÖÐÊôÓÚË«ÒþÐÔÐÔ×´µÄÊÇÂÌÉ«ÖåÁ££®
£¨4£©ÔÓ½»ºó´úÖУ¬Ô²Á£ÓëÖåÁ£µÄ±ÈÊÇ3£º1£®
£¨5£©ÔÓ½»ºó´úÖлÆÉ«ÖåÁ£ËùÕ¼µÄ±ÈÀýÊÇ$\frac{1}{8}$£®

Answer 1

·ÖÎö 1¡¢»ùÒò·ÖÀ붨ÂɺÍ×ÔÓÉ×éºÏ¶¨ÂɵÄʵÖÊ£º½øÐÐÓÐÐÔÉúÖ³µÄÉúÎïÔÚ½øÐмõÊý·ÖÁѲúÉúÅä×ӵĹý³ÌÖУ¬Î»ÓÚͬԴȾɫÌåÉϵĵÈλ»ùÒòËæͬԴȾɫÌå·ÖÀë¶ø·ÖÀ룬·Ö±ð½øÈ벻ͬµÄÅä×ÓÖУ¬ËæÅä×Ó¶ÀÁ¢ÒÅ´«¸øºó´ú£¬Í¬Ê±Î»ÓÚ·ÇͬԴȾɫÌåÉϵķǵÈλ»ùÒò½øÐÐ×ÔÓÉ×éºÏ£®
2¡¢ÓÉÖùÐÎͼ¿ÉÖª£¬»ÆÉ«Ô²Á£ºÍÂÌÉ«Ô²Á£½øÐÐÔÓ½»£¬×Ó´úÖÐÔ²Á££ºÖåÁ£=3£º1£¬Ï൱ÓÚ1¶ÔÔÓºÏ×Ó×Ô½»£¬Ç×±¾»ùÒòÐÍÊÇRr¡ÁRr£¬»ÆÉ«£ºÂÌÉ«=1£º1£¬Ï൱ÓÚÒ»¶ÔÔÓºÏ×Ӳ⽻£¬Ç×±¾»ùÒòÐÍÊÇYy¡Áyy£¬×ÛºÏ2¶ÔÏà¶ÔÐÔ×´£¬Ç×±¾»ùÒòÐÍÊÇYyRr¡¢yyRr£¬·Ö±ð±íÏÖΪ»ÆÉ«Ô²Á£ºÍÂÌÉ«Ô²Á££®

½â´ð ½â£º£¨1£©2¶ÔÏà¶ÔÐÔ×´·Ö±ðÓÉ2¶ÔµÈλ»ùÒò¿ØÖÆ£®Ã¿Ò»¶ÔÏà¶ÔÐÔ×´µÄÒÅ´«×ñÑ­»ùÒò·ÖÀ붨ÂÉ£®
£¨2£©ÓÉ·ÖÎö¿ÉÖª£¬Ç×±¾»ùÒòÐÍ·Ö±ðÊÇYyRr¡¢yyRr£®
£¨3£©ºó´úÖÐÂÌÉ«ÖåÁ£ÊÇË«ÒþÐÔÐÔ×´£®
£¨4£©ÓÉÖùÐÎͼ¿ÉÖª£¬ÔÓ½»ºó´úÔ²Á££ºÖåÁ£=3£º1£®
£¨5£©YyRrÓëyyRrÔÓ½»£¬ºó´úÖлÆÉ«ÖåÁ£µÄ»ùÒòÐÍÊÇYyrr=$\frac{1}{2}¡Á\frac{1}{4}=\frac{1}{8}$£®
¹Ê´ð°¸Îª£º
£¨1£©»ùÒòµÄ·ÖÀë
£¨2£©YyRr¡¢yyRr
£¨3£©ÂÌÉ«ÖåÁ£
£¨4£©3£º1
£¨5£©$\frac{1}{8}$

µãÆÀ ±¾ÌâÖ¼ÔÚ¿¼²éѧÉúÀí½â»ùÒò·ÖÀ붨ÂɺÍ×ÔÓÉ×éºÏ¶¨ÂɵÄʵÖÊ£¬Ñ§»á·ÖÎöÖùÐÎͼд³öÔÓ½»×Ó´úµÄ±íÏÖÐͼ°±ÈÀý£¬²¢ÍƳöÇ×±¾»ùÒòÐÍ£¬Ñ§»áÓ¦Ó÷ÖÀ붨Âɽâ´ð×ÔÓÉ×éºÏÎÊÌ⣮