题目内容
设集合M={α|α=
-
,k∈Z},N={α|-π<α<π},则M∩N=______.
| kπ |
| 2 |
| π |
| 3 |
由-π<
-
<π得-
<k<
,∵k∈Z,
∴k=-1,0,1,2,即α=-
π,-
,
,
π.
则M∩N={-
π,-
,
,
π}.
故答案为:{-
π,-
,
,
π}
| kπ |
| 2 |
| π |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
∴k=-1,0,1,2,即α=-
| 5 |
| 6 |
| π |
| 3 |
| π |
| 6 |
| 2 |
| 3 |
则M∩N={-
| 5 |
| 6 |
| π |
| 3 |
| π |
| 6 |
| 2 |
| 3 |
故答案为:{-
| 5 |
| 6 |
| π |
| 3 |
| π |
| 6 |
| 2 |
| 3 |
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