0,1/3, 5/8,5/6,9/10,( )
A.5/6
B.8/9
C.13/14
D.21/20
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参考答案:
A【答案】A。本题考查分式数列。分子是三级等差数列:0251018 (30)\/\/\/\/\/2358(12)\/\/\/\/123(4)等差数列分母是二级等差数列:5681220 (36)\/\/\/\/\/1248(16)等比数列所以答案为30/36=5/6,答案为A。
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