6/28,21/98,18/84,9/42,( )

昕玥2019-12-17  5

问题 6/28,21/98,18/84,9/42,( )

选项 A.25/60B.12/44C.12/56D.25/78

答案C

解析原数列中的各项约分后均为3/14,则空缺项也应约分后为3/14。故正确答案为C。
转载请注明原文地址:https://ti.zuoweng.com/ti/4w2NKKKQ