A.(3x2+xcosx)′=6x+cosx-xsinx | ||||||
B.(sin2x)′=2cos2x | ||||||
C.(
| ||||||
D.(lnx-
|
sinx |
x |
xcosx-sinx |
x2 |
1 |
x2 |
1 |
x |
2 |
x3 |
A.x2-x+1 | B.(x+1)(2x-1) | C.3x2 | D.3x2+1 |
∫ | 20 |
1 | ||
1-
|
1 | ||
1+
|
A.3f(ln2)>2f(ln3) |
B.3f(ln2)=2f(ln3) |
C.3f(ln2)<2f(ln3) |
D.3f(ln2)与2f(ln3)的大小不确定 |
1 |
2 |
1 |
x2 |
2 |
27 |
1 |
xln2 |
A.0 | B.1 | C.2 | D.3 |
1-lnx |
1+lnx |
A.-
| B.
| C.-
| D.-
|
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