48/121 ( ) 70/169 81/196 92/225 A. 58/144B. 51/126C. 65/131D. 59/144

48/121 ( ) 70/169 81/196 92/225


A. 58/144
B. 51/126
C. 65/131
D. 59/144

参考解析

解析:这是一道双重复合数列题,分子是首项48公差11的等差数列;分母是11、12、13、14、15的平方,所以第二项应为59/144,选D。

相关考题:

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