用换元法解分式方程
-
+1=0,如果设
=y,那么原方程化为关于y的整式方程是( )
| 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 |
| 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 |