x2+1 |
x |
3x |
x2+1 |
x2+1 |
x |
A.y2+y-3=0 | B.y2-3y+1=0; | C.3y2-y+1=0 | D.3y2-y-1=0 |
x2+1 |
x |
x2+1 |
x |
3x |
x2+1 |
|
x+2 |
x-2 |
16 |
x2-4 |
3 |
x+2 |
20 |
x2+3x |
A.20y2+8y-1=0 | B.8y2-20y+1=0 |
C.y2+8y-20=0 | D.y2-8y-20=0 |
4 |
x-2 |
x2 |
x-2 |
4x+10 |
3x-6 |
5x-4 |
x-2 |
x+1 |
x-1 |
k |
x2-1 |
A.1 | B.-1 | C.1或-1 | D.0 |
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