a2+1 |
x |
A.x1<x2<x3 | B.x1<x3<x2 | C.x3<x2<x1 | D.x2<x3<x1 |
a2+1 |
x |
-3 |
x |
A.y3<y1<y2 | B.y1<y2<y3 | C.y3<y2<y1 | D.y2<y1<y3 |
k |
x |
1 |
x |
A.y3<y2<y1 | B.y3<y1<y2 | C.y1<y2<y3 | D.y1<y3<y2 |
k |
x |
A.(-2,1) | B.(2,-1) | C.(-1,2) | D.(2,1) |
1 |
x |
A.S=1 | B.1<S<2 | C.S=2 | D.S>2 |
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