lim |
x→4 |
f(x)-f(4) |
x-4 |
lim |
t→0 |
f(4-t)-f(4) |
2t |
A.4 | B.-4 | C.1 | D.-1 |
lim |
x→4 |
f(x)-f(4) |
x-4 |
lim |
t→0 |
f(4+t)-f(4) |
t |
lim |
t→0 |
f(4-t)-f(4) |
2t |
lim |
t→0 |
f(4+t)-f(4) |
-2t |
1 |
2 |
lim |
t→0 |
f(4+t)-f(4) |
t |
1 |
2 |
1 |
x |
A.(1,-1) | B.(2,ln2-
| C.(3,ln3-
| D.(4,ln4-
|
A.极小值为-2,极大值为0 |
B.极小值为-3,极大值为-1 |
C.极小值为-3,极大值为1 |
D.极小值为3,极大值为1 |
A.
| B.
| ||||||||
C.
| D.
|
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