å¹³åå¾ã§èãã¾ãã åºç¤ã¨ãã¦ã ããé³((Z)ã¨ãã¾ã)ã®åé³ä¸ã®é³ãã(Z+1)ã¨æ¸ããã¨ã«ãã¾ãããã ãã®ããã«åé³ä¸ã®é³ã¯(Z+2)ã§ããã f(Z)ã¯ã(Z)ã®å¨æ³¢æ°ã f(Z+1)ã¯ã(Z+1)ã®å¨æ³¢æ°ãã¨ãã¾ãã f(Z+12) = 2Ãf(Z) ã ã¨ããã£ã¦ããããã§ããã ã¾ããf(Z+1):f(Z) ã®æ¯ç㨠f(Z+2):f(Z+1) ã®æ¯çããã®å¾å ¨ã¦ãåé³éãé³å士ã®æ¯çã¯ãããä¸å®å¤aã§ãã¹ã¦çãããã¨ãåæã¨ãã¾ãã(â»1) ããã©ããããã¨ãæ¸ãã¾ãããã f(Z)ã«12åaãæãããf(Z+12)ããªãã¡2Ãf(Z)ã«ãªãã®ã§ãããã f(Z+12) = a^12 à f(Z) 2Ãf(Z) = a^12 à f(Z) ãã£ã¦ã2 = a^12 ã§ãããaã¯æ£ã®å®æ°ã§ããããã(ãã¤ãã¹ã¨ãè¤ç´ æ°ãããªãã§ããã)ã a = 2^(1/12) ã¨ãªãã¾ã
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