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数字找规律,公务员考题请说出判断全过程：31.2,1,9,30,117,（ ）.A.516 B.441 C.217 D.17432.5,9,14,27,48,86,（ ）.A.170 B.162 C.157 D.13433.2,2,8,21,42,（ ）.A.72 B.74 C.86 D.9034.0,3,26,255,（ ）.A.479 B.3124 C.2600 D.310435.19,7,23,47,31,（ ）.A.14 B.44 C.57 D.61

分类: 作业答案 • 2023-01-23 22:50:28
问题描述：

数字找规律,公务员考题
请说出判断全过程：
31.2,1,9,30,117,（ ）.
A.516 B.441 C.217 D.174
32.5,9,14,27,48,86,（ ）.
A.170 B.162 C.157 D.134
33.2,2,8,21,42,（ ）.
A.72 B.74 C.86 D.90
34.0,3,26,255,（ ）.
A.479 B.3124 C.2600 D.3104
35.19,7,23,47,31,（ ）.
A.14 B.44 C.57 D.61

答

31.2,1,9,30,117,（ ）.
A.516 B.441 C.217 D.174
(2+1)*3=9
(1+9)*3=30
(9+30)*3=117
(30+117)*3=441
32.5,9,14,27,48,86,（ ）.
5+9+14-1=27
9+14+27-2=48
14+27+48-3=86
27+48+86-4=157
33.2,2,8,21,42,（ ）.
A.72 B.74 C.86 D.90
为二级等差数列
2,2,8,21,42
差为0,6,13,21
二级差6,7,8
则9+21+42=72
34.0,3,26,255,（ ）.
A.479 B.3124 C.2600 D.3104
1的1次方减1=0
2的2次方减1=3
3的3次方减1=26
4的4次方减1=255
5的5次方减1=3124

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