A.82B.91C.85D.101
2.120,24,6,2,1,()
A.1B.0.1C.0.25D.0.1252
3.(4,13)(7,22)(10,31)(13,40)()
A.(15,45)B.(16,49)C.(16,51)D.(15,49)
4.32,48,72,108,162,()
A.243B.251C.258D.262
5.1,2,2,5,9,()
A.13B.14C.15D.16
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1.D【解析】各項分別是22+1,42+1,62+1,82+1,(102+1)
2.A【解析】兩項之商分別是5,4,3,2,1?! ?br />
3.B【解析】每組兩數(shù)之差分別為9,15,21,27,(33)
4.A【解析】略
5.D【解析】1+2+2=5,2+2+5=9,2+5+9=16