x2+1 |
x+1 |
2x+2 |
x2+1 |
A.x2+1=y | B.
| C.
| D.
|
x2+1 |
x+1 |
2 |
y |
x2+3 |
x |
4x |
x2+3 |
2x+1 |
2x-1 |
A.1 | B.2 | C.
| D.
|
x |
x+1 |
x |
x+1 |
x |
x+1 |
A.y2+2y+3=0 | B.y2-2y+3=0 | C.y2+2y-3=0 | D.y2-2y-3=0 |
6 |
x |
2(x2+1) |
x+1 |
6(x+1) |
x2+1 |
x2+1 |
x+1 |
A.2y2-7y+6=0 | B.2y2-7y-6=0 | C.2y2+7y-6=0 | D.2y2+7y+6=0 |
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