2.1,4.5,8.9,16.13,32.17,()A. 64.19 B. 6

考试题库2022-08-02  5

问题 2.1,4.5,8.9,16.13,32.17,()A. 64.19B. 64.21C. 128.19D. 128.21

选项 A. 64.19
B. 64.21
C. 128.19
D. 128.21

答案 B

解析 知识点:等差数列

多重数列隔项看,小数点前面是2的N次方,后面是等差数列,差值为4
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