题目内容
集合A={x|
∈Z,x∈N},则集合A中元素的个数为
______.
| 6 |
| x-3 |
∵A={x|
∈Z,x∈N}
∴x=9
=1
x=6
=2
x=5
=3
x=4
=6
x=2
=-6
x=1
=-3
x=0
=-2
∴A中元素个数为7
故答案为:7
| 6 |
| x-3 |
∴x=9
| 6 |
| x-3 |
x=6
| 6 |
| x-3 |
x=5
| 6 |
| x-3 |
x=4
| 6 |
| x-3 |
x=2
| 6 |
| x-3 |
x=1
| 6 |
| x-3 |
x=0
| 6 |
| x-3 |
∴A中元素个数为7
故答案为:7
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