x+a |
x2-2 |
x+a |
x2-2 |
x+a |
x2-2 |
2 |
x-
| ||
x2-2 |
1 | ||
x+
|
2 |
x+
| ||
x2-2 |
1 | ||
x-
|
2 |
x+a |
x2-2 |
9 |
4 |
9 |
4 |
2 |
2 |
A.2010∈A∪B | B.2010∉A且2010∉B |
C.2010∈({C_U}A)∩({C_U}B) | D.2010∈({C_U}A)∪({C_U}B) |
A.{3} | B.{3,4,5,6} | C.{{3}} | D.{{3},Φ} |
A.x2≤0 | B.|x-5|>0 | C.
| D.
|
ax-6 |
x-a |
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