1 |
x |
1 |
3 |
1 |
x |
1 |
3 |
1 |
x |
1 |
3 |
1 |
3 |
|
|
1 |
x |
1 |
3 |
1 |
x |
1 |
x2 |
4 |
x |
1 |
x |
-x2+2x+3 |
A.[1,3] | B.(1,+∞) | C.(-∞,3] | D.(-∞,1] |
1 |
x-1 |
1 | ||
|
A.{x|x>1} | B.{x|x<1} | C.{x|-1<x<1} | D.∅ |
4x |
x2+1 |
1 |
8 |
A.①②③④ | B.①②④ | C.①③④ | D.①③ |
A.f(x)=sinx2 | B.f(x)=
| ||||
C.f(x)=-21-|x| | D.f(x)=-log2(|x|+1) |
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