几个觉得比较难的数列,一、7,9,40,74,1526,()a.1600 b.5436 c.1640 d.3052二、5
1个回答
1.24,70,208,( )
A.140 B.416 C.622 D.278
A*3-2=B
24*3-2=70
70*3-2=208
208*3-2=622
2.0,1,3,8,21,( )
A.42 B.29 C.55 D.63
3B-A=C
3*1-0
3*3-1
3*8-3
3*21-8
3.7,9,40,74,1526,( )
A,1600 B.5436 C.1640 D.3052
2A-B=C
7^2-9=40
9^2-7=74
40^2-74=1526
74^2-40=5436
4.8,12,24,60,( )
A.168 B.84 C.120 D.128
B/A=...
12/8＝1.5
24/12＝2
60/24＝2.5
180/60＝3
5.10,26,65,( )
A.122 B.145 C.170 D.197
9+1,25+1,64+1,144+1
6.2,15,7,40,77,( )
A.96 B.126 C.138 D.156
多了个7
2+13*1-0=15 15+13*2-1=40 40+13*3-2=77 77+13*4-3=126
7.-1,4,21,56,115,( )
A.146 B.178 C.195 D.204
1=1^3-2
4=2^3-4
21=3^3-6
56=4^3-8
115=5^3-10
204=6^3-12
8.2,30 ,130,350,( )
A.729 B.738 C.1029 D.1225
解1,3,5,7,9的立方加上1,3,5,7,9,
你自己找吧
