2.4,3/2,20/27,7/16,36/125,( )A.39/144 B.11/54 C.68/196 D.7

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2.4,3/2,20/27,7/16,36/125,()A.39/144B.11/54C.68/196D.72.4,3/2,20/27,7/16,36/125,()A.39/144B.11/54C.6

2.4,3/2,20/27,7/16,36/125,( )A.39/144 B.11/54 C.68/196 D.7
2.4,3/2,20/27,7/16,36/125,( )A.39/144 B.11/54 C.68/196 D.7

2.4,3/2,20/27,7/16,36/125,( )A.39/144 B.11/54 C.68/196 D.7
化4/1,12/8,20/27,28/64,36/125分子等差8分母自然数的立方数列故36+8/6^3=44/216=11/54B