2,1,9,30,117,441,( )A.1604 B.1674 C.15

考试题库2022-08-02  7

问题 2,1,9,30,117,441,( )A.1604B.1674C.1574D.1504

选项 A.1604
B.1674
C.1574
D.1504

答案 B

解析 9=(2+1)×3,30=(9+1)×3,117=(9+30)×3,441=(30+117)×3,所以( )=(117+441)×3=1674。
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