题目内容
设f(n)=2n+1(n∈N),P={1,2,3,4,5},Q={3,4,5,6,7},记
={n∈N|f(n)∈P},
={n∈N|f(n)∈Q},则(
∩CN
)∪(
∩CN
)=( )
| ? |
| P |
| ? |
| Q |
| ? |
| P |
| ? |
| Q |
| ? |
| Q |
| ? |
| P |
| A.{0,3} | B.{1,2} | C.(3,4,5} | D.{1,2,6,7} |
| ? |
| P |
| ? |
| Q |
| ? |
| P |
| ? |
| Q |
| ? |
| Q |
| ? |
| P |
∴(
| ? |
| P |
| ? |
| Q |
| ? |
| Q |
| ? |
| P |
故选A
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设f(n)=2n+1(n∈N),P={1,2,3,4,5},Q={3,4,5,6,7},记
={n∈N|f(n)∈P},
={n∈N|f(n)∈Q},则(
∩CN
)∪(
∩CN
)=( )
| ? |
| P |
| ? |
| Q |
| ? |
| P |
| ? |
| Q |
| ? |
| Q |
| ? |
| P |
| A、{0,3} |
| B、{1,2} |
| C、{3,4,5} |
| D、{1,2,6,7} |