Question

20£®ÕÒ¹æÂÉ£¬ÌîÉϺÏÊʵķÖÊý£º
£¨1£©$\frac{1}{1}$©p$\frac{1}{2}$©p$\frac{1}{4}$¡¢$\frac{£¨\;\;\;\;£©}{£¨\;\;\;\;£©}$¡¢$\frac{£¨\;\;\;\;£©}{£¨\;\;\;\;£©}$©p$\frac{1}{32}$¡¢$\frac{£¨\;\;\;\;£©}{£¨\;\;\;\;£©}$
£¨2£©$\frac{1}{2}$©p$\frac{2}{3}$©p$\frac{£¨\;\;\;\;£©}{£¨\;\;\;\;£©}$©p$\frac{£¨\;\;\;\;£©}{£¨\;\;\;\;£©}$©p$\frac{5}{6}$©p$\frac{£¨\;\;\;\;£©}{£¨\;\;\;\;£©}$©p$\frac{7}{8}$£®

Answer 1

·ÖÎö £¨1£©¹Û²ì¿ÉÖª·ÖÊýµÄ·Ö×ÓΪ1£¬Êǵڼ¸¸öÊý·Öĸ¾ÍÊÇ2µÄ¼¸¼õ1´Î·½£¬¾Ý´Ë½â´ð¼´¿É£»
£¨2£©¹Û²ì¿ÉÖª·ÖÊýµÄÊǵڼ¸¸öÊý·Ö×Ó¾ÍÊǼ¸£¬·ÖĸÊÇ·Ö×Ó¼Ó1£¬¾Ý´Ë½â´ð¼´¿É£®

½â´ð ½â£º£¨1£©$\frac{1}{1}$©p$\frac{1}{2}$©p$\frac{1}{4}$¡¢$\frac{1}{8}$¡¢$\frac{1}{16}$©p$\frac{1}{32}$¡¢$\frac{1}{64}$£»
£¨2£©$\frac{1}{2}$©p$\frac{2}{3}$©p$\frac{3}{4}$©p$\frac{4}{5}$©p$\frac{5}{6}$©p$\frac{6}{7}$©p$\frac{7}{8}$£®
¹Ê´ð°¸Îª£º£¨1£©$\frac{1}{8}$£¬$\frac{1}{16}$£¬$\frac{1}{64}$£»£¨2£©$\frac{3}{4}$£¬$\frac{4}{5}$£¬$\frac{6}{7}$£®

µãÆÀ ±¾Ì⿼²éÁËÊýÁÐÖеĹæÂÉ£¬±¾Ìâ¹Ø¼üÊÇÕÒ³ö·ÖÊýµÄ·Ö×ÓÓë·ÖĸµÄ¹æÂÉ£®