问题
选择题
已知集合A={x|
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答案
∵集合A={x|
∈N*,且x∈Z},6 5-x
∴5-x>0可得x<5,
取x=4,
=6,满足;6 5-4
取x=3,
=3,满足题意;6 5-3
取x=2,
=2,满足题意;6 5-2
取x=1,
=6 4
,不满足题意,3 2
取x=0,可得
,不满足题意;6 5
取x=-1,可得
=1,满足题意;6 6
取x=-2,可得
=6 6-(-1)
,不满足题意;6 7
若x<-2,可得
<1,不满足题意,6 5-x
∴A={-1,2,3,4};
故选D;