f(x0-k)-f(x0) |
2k |
A.2 | B.1 | C.-1 | D.-2 |
lim |
x→0 |
f(x+x0)-f(x0) |
x |
lim |
x→0 |
f(x0-k)-f(x0) |
2k |
1 |
2 |
lim |
x→0 |
f(x0-k)-f(x0) |
-k |
1 |
2 |
lim |
x→0 |
f(x0-k)-f(x0) |
2k |
1 |
2 |
1 |
2 |
A.
| B.
| C.
| D.
|
A.
| B.
| ||||
C.
| D.
|
A.[-
| B.(-∞,-
| C.[-
| D.(-∞,-
|
6x |
1+x2 |
A.3 | B.4 | C.2 | D.5 |
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