nπ |
5 |
f(1)+f(2)+…+f(2009) |
f(11)+f(22)+f(33) |
π |
5 |
2π |
5 |
3π |
5 |
4π |
5 |
3π |
5 |
4π |
5 |
3π |
5 |
4π |
5 |
2009 |
4 |
2009π |
5 |
4π |
5 |
4π |
5 |
π |
4 |
a |
4 |
1 |
2 |
A.单调递增函数 | B.单调递减函数 |
C.奇函数 | D.偶函数 |
A.f(x)=(x+1)2 | B.f(x)=ln(x-1) | C.f(x)=
| D.f(x)=ex |
|
A.(1,+∞) | B.(-∞,3) | C.(
| D.(1,3) |
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