A.(x+
| B.(log2x)′=
| ||||||
C.(3x)′=3xlog3e | D.(x2cosx)′=-2xsinx |
1 |
x |
1 |
x2 |
A.(x+
| B.(log2x)′=
| ||||||
C.(3x)′=3xlog3x | D.(x2cosx)′=-2xsinx |
A.xcosx+sinx | B.xcosx | C.xcosx-sinx | D.cosx-sinx |
A.f(-1)=f(1) | B.f(-1)>f(1) | C.f(-1)<f(1) | D.不能确定 |
sinθ |
2+cosθ |
A.
| B.2
| C.3
| D.0 |
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