4 |
3 |
|
|
t |
t |
1 |
2 |
17 |
4 |
1 |
4 |
17 |
4 |
2 |
t |
2 |
2 |
2 |
17 |
4 |
2 |
1 |
4 |
17 |
4 |
|
t |
t |
1 | ||
|
2 |
t |
2 |
t |
2 |
t |
2 |
t2 |
3 |
t |
1 |
t |
1 |
3 |
7 |
9 |
7 |
9 |
f2(1)+f(2) |
f(1) |
f2(2)+f(4) |
f(3) |
f2(3)+f(6) |
f(5) |
f2(1005)+f(2010) |
f(2009) |
|
A.[2,+∞) | B.[-1,0] | C.[-1,0]∪[2,+∞) | D.(-∞,-1]∪(0,2] |
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