2x+a |
1+2x |
1+x |
1-x |
1+x |
m |
2x+a |
1+2x |
2-x+a |
1+2-x |
1+a•2x |
1+2x |
2x+a |
1+2x |
1+a•2x |
1+2x |
1+x |
1-x |
1+x |
m |
|
|
|
a(x2-1) |
x(a2-1) |
A.3 | B.4 | C.5 | D.6 |
|
A.[-1,2] | B.[0,2] | C.[1,+∞) | D.[0,+∞) |
A.x+y≤0 | B.x+y≥0 | C.x-y≥0 | D.x-y≤0 |
1 |
2 |
3 |
A.0≤a≤2 | B.-
| C.-4<a<0 | D.a<0 |
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