x2 |
x+3 |
A.
| B.
| C.
| D.
|
(x2)′(x+3)-x2(x+3)′ |
(x+3)2 |
2x(x+3)-x2 |
(x+3)2 |
x2+6x |
(x+3)2 |
A.f(a)<eaf(0) |
B.f(a)>eaf(0) |
C.f(a)=eaf(0) |
D.与f(x)或a的值有关,不能确定 |
A.cosx | B.-cosx | C.sinx | D.-sinx |
A.excosx | B.exsinx |
C.-excosx | D.ex(sinx+cosx) |
1 |
3 |
A.3 | B.2 | C.-2 | D.-3 |
π |
3 |
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