lim |
x→-3 |
x2-9 |
x+3 |
A.-6 | B.0 | C.6 | D.3 |
lim |
x→-3 |
x2-9 |
x+3 |
lim |
x→-3 |
(x-3)(x+3) |
(x+3) |
lim |
x→-3 |
lim |
n→∞ |
1+2+3+…+n |
n2 |
A.2 | B.4 | C.
| D.0 |
1 |
f(n) |
lim |
n→∞ |
A.1 | B.
| C.0 | D.不存在 |
A.0 | B.1 | C.2 | D.3 |
x |
x+2 |
A.y=2x+1 | B.y=2x-1 | C.y=-2x-3 | D.y=-2x-2 |
A.12x-y-2=0 | B.2x-y+8=0 | C.2x+y-12=0 | D.x-2y+19=0 |
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