5,5,14,38,87,( )A.167; B.168; C.169; D.170;

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问题 5,5,14,38,87,( )

选项 A.167;
B.168;
C.169;
D.170;

答案A

解析选A,两项差=>0,9,24,49,80=>12-1=0,32-0=9,52-1=24,72-0=49,92-1=80,其中底数1,3,5,7,9等差,所减常数成规律1,0,1,0,1
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