问题
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4, 3/2, 20/27, 7/16, 36/125, () A.39/144 B.11/54 C.68/196 D.7
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1,1/2,3/13,1/10,5/121,()。A. 7/144B. 3/182C. 5/169 D. 9/196
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1,1/2,3/13,1/10,5/121,()。 A. 7/144 B. 3/182 C. 5/169 D. 9/196
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1,1/2,3/13,1/10,5/121,()。 A.7/144 B.3/182 C.5/169 D.9/196
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1,2,3,10,39,()A.57B.113C.172 D.196
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1,2,3,10,39,()A.57B.113C.172 D.196