2 |
2 |
A.①③ | B.①②③ | C.② | D.①② |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
A.
| B.
| ||||||||
C.
| D.
|
A.x-y+1=0 | B.x-y-1=0 | C.x+y-1=0 | D.x+y+1=0 |
lim |
△x→0 |
f(x0+2△x)-f(x0) |
△x |
A.2 | B.-2 | C.
| D.-
|
A.(0,-1)或(1,0) | B.(1,0)或(-1,-4) |
C.(-1,-4)或(0,-2) | D.(1,0)或(2,8) |
lim |
△x→0 |
f(x0-△x)-f(x0+△x) |
△x |
A.m | B.-m | C.2m | D.-2m |
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