451. 4,-3,21,(),129,147
A.8 B.9 C.11 D.3
解析:A×6+B=C
4×6+(-3)=21
-3×6+21=()=3
21×6+3=129
3×6+129=147
452. 2, 15, 7, 40, 77 ( )
A.96 B.126 C.138 D.156
解析:15-3=4^2-3
40-7=6^2-3
138-77=8^2-3
453. 25, 58, 811, ( ), 1417
A.56 B.1114 C.67 D.1315
解析:分开看2 5 8 11 14
5 8 11 14 17
454. 1,3,4,1,9,()
解析:3-1=2^2=4
4-3=1^2=1
1-4=(-3)^2=9
9-1=8^2=64
455. 1,2,4,4,1,( )
A.2 B.0 C.1/16 D.3
解析:4=(2/1)^2
4=(4/2)^2
1=(4/4)^2
?=(1/4)^2
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