lim |
x→-∞ |
x2-x+1 |
lim |
x→-∞ |
x2-x+1 |
lim |
x→-∞ |
x2-x+1 |
lim |
x→-∞ |
(
| ||||
|
lim |
x→-∞ |
(2k-1)x+1-k2 | ||
|
2k-1 |
2 |
3 |
2 |
3 |
2 |
x |
x |
A.(-∞,2] | B.(-∞,2) | C.(2,+∞) | D.[2,+∞) |
a |
3 |
b |
2 |
4a |
f′(n)+2a(b2+1) |
A.(1,0) | B.(2,8) |
C.(1,-1)和(-1,-3) | D.(2,8)和(-1,-4) |
lim |
n→∞ |
3n |
n+3 |
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