2(x2+1) |
x |
6x |
x2+1 |
x2+1 |
x |
A.2y2-7y+6=0 | B.2y2+7y+6=0 | C.y2-7y+6=0 | D.y2+7y+6=0 |
x2+1 |
x |
6 |
y |
1 |
x-2 |
2 |
x-1 |
A.-3 | B.0 | C.2 | D.3 |
x2+a |
x-2 |
3 |
2 |
3 |
2 |
x |
x2-x |
x2-1 |
x2-2x+1 |
2 |
x+1 |
1 |
3 |
5 |
x+1 |
4 |
x |
2 |
x2+x |
A.y2-y+2=0 | B.y2-y-2=0 | C.y2+y-2=0 | D.y2+y+2=0 |
© 2017-2019 超级试练试题库,All Rights Reserved.