a(x2-1) |
x(a2-1) |
a(a2t-1) |
at(a2-1) |
a |
a2-1 |
a2t-1 |
at |
a |
a2-1 |
a |
a2-1 |
a |
a2-1 |
a |
a2-1 |
ax1-ax2 |
ax1+x2 |
a(ax1-ax2)(ax1+x2+1) |
(a2-1)ax1+x2 |
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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