A.若f(x)=3,则f′(x)=0 | ||||||
B.若f(x)=sinx+cosx,则f′(x)=cosx+sinx | ||||||
C.若f(x)=3x+1,则f′(1)=3 | ||||||
D.若f(x)=-
|
x |
1 | ||
2
|
π |
4 |
3 |
5π |
12 |
11π |
12 |
π |
6 |
π |
3 |
3 |
A.1 | B.2 | C.3 | D.4 |
A.若x<y,则x2<y2 | B.若x2=1,则x=1 | ||||||||
C.若x=y,则
| D.若
|
a |
b |
c |
a |
b |
c |
∫ | a1 |
1 |
x |
A.①② | B.③④ | C.②④ | D.①③ |
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