分段函数与抽象函数
A.1 | B.-1 | C.2012 | D.-2012 |
A.1 | B.0 | C.0或1 | D.不确定 |
|
1 |
2 |
π |
2 |
3π |
2 |
A.(-∞,0] | B.[0,+∞) | C.[-2,0] | D.[0,2] |
1 |
4 |
1 |
2 |
1 |
4 |
|
1 |
2 |
|
A.0 | B.1 | C.2007! | D.(2007!)2 |
A.f(x)•f(y)=f(x+y) | B.
|
C.f(x)•f(y)=f(x•y) | D.f(log34)=4 |
|
π |
2 |
π |
12 |
7π |
12 |
π |
12 |
7π |
12 |
π |
3 |
π |
3 |
π |
4 |
π |
3 |
|
|
3 |
2 |
1 |
2 |