A. B.1 C.16 D.32 查看更多

 

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下列数列为等比数列的是(   )

A.1,2,3,4,5,6,                    B.1,2,4,8,16,32,

C.0,0,0,0,0,0,                    D.1,-2,3,-4,5,-6,

 

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下列数列为等比数列的是(   )

A.1,2,3,4,5,6, B.1,2,4,8,16,32,
C.0,0,0,0,0,0, D.1,-2,3,-4,5,-6,

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下列数列为等比数列的是(   )
A.1,2,3,4,5,6, B.1,2,4,8,16,32,
C.0,0,0,0,0,0, D.1,-2,3,-4,5,-6,

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集合{x∈N|0<|x﹣1|<4}的真子集的个数是  
  [     ]
A.32
B.31
C.16
D.15

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集合M={1,2,3,4,5}的子集个数是

[  ]

A.32
B.31
C.16
D.15

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