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A.(-1,0)∪(0,1) | B.(-∞,-1)∪(1,+∞) | C.(-1,0)∪(1,+∞) | D.(-∞,-1)∪(0,1) |
1 |
2 |
π |
2 |
A.(-∞,1) | B.(-∞,0) | C.(-∞,
| D.(0,1) |
A.f(x1)>f(x2) | B.f(x1)≥f(x2) | C.f(x1)<f(x2) | D.f(x1)≤f(x2) |
1 |
2 |
A.
| B.3 | C.9 | D.
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A.函数f(x)=
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B.函数f(x)=(1-x)
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C.函数f(x)=x+
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D.函数f(x)=1既是奇函数又是偶函数 |
1 |
x |
A.(
| B.(0,
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C.(
| D.(0,
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