1 |
3 |
3 |
2 |
f′(x) |
x |
|
f′(x) |
x |
x2-3ax-a+3 |
x |
(2x-3a)x-(x2-3ax-a+3) |
x2 |
x2-(3-a) |
x2 |
• |
⇒ |
3-a |
3-a |
. | 3-a |
7-7a |
2 |
7-7a |
2 |
7-7a |
2 |
A.f(x)=ex | B.f(x)=x3 | C.f(x)=lnx | D.f(x)=sinx |
A.3x+y-11=0 | B.3x-y+6=0 | C.x-3y-11=0 | D.3x-y-11=0 |
A.1 | B.2 | C.7 | D.不能确定 |
1 |
4 |
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