A.y=-2x+2 | B.y=2x-2 | C.y=-x+1 | D.y=1 |
lim |
t→0 |
f(2)-f(2-t) |
2t |
A.-1 | B.-
| C.1 | D.
|
A.f′(x0)=0 | B.f′(x0)>0 | C.f′(x0)<0 | D.f′(x0)不存在 |
lim |
x→0 |
f(1)-f(1-x) |
2x |
A.2 | B.-1 | C.
| D.-2 |
A.1 | B.
| C.2 | D.2
|
A.3x+y-3=0 | B.3x-y-1=0 | C.x-y+1=0 | D.x+y-1=0 |
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