首页
(2004•本溪)用换元法解方程++7=0,如果=y,那么原方程可变形为A.2y2-7y+...
试题详情
(2004•本溪)用换元法解方程
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC0AAAAqCAYAAAAnH9IiAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
+
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACcAAAAqCAYAAAAwPULrAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
+7=0,如果
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABwAAAAqCAYAAACgLjskAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAF4SURBVFhH7VdRDsMgCPVk3snreBmP4lEYWLHr
phYsa/bRJc3SRH3yeMCrg5t/7mY8+CfADNE7cI6eAMmIimGEOQaIeUNJAUF9hPp6CVpGaY7gjaKU
ASKh4VZAjDAwv5cIBZlKU7TJH931lNIcPQQriZ4BEphvVCaIGlqL0HxTOmdiGGEphVKD/HxvHqYz
hbpPASjSBh48ppuU3QEk2igKpk5V5CuAJRLiGztJ0gpkGRCbFvXNXSBjQr9z+5bnA78DSvloOkgt
//UIUfIec6lFXAVMAcdPzWPG/ygt9BVAUugWWJ1/FmOoFP2e23fiTlubqB4Vix5ABVmypaiZzyb9
u3fRPJTdW77qEY2cK145mPSnE3+KNGppk0n/G8Byan8s9QH5hq2f0uaOzV9o2pMIqYmTFzm67eng
PbhyTYT1GpvPmXwx2Ua4e5w8Uo41IJmpnolt+JaAbO2bx+kdbgHIomjOjRWr8TmTSX+tDvX9p+14
mvcF8vpbX8Rk61ZzgaU9AAAAAElFTkSuQmCC
)
=y,那么原方程可变形为( )
A.2y
2-7y+6=0
B.2y
2-7y-6=0
C.2y
2+7y-6=0
D.2y
2+7y+6=0
相关试题
-
(2004•本溪)用换元法解方程
+
+7=0,如果
=y,那么原方程可变形为( )
A.2y2-7y+6=0
B.2y2-7y-6=0
C.2y2+7y-6=0
D.2y2+7y+6=0
-
(2004•本溪)用换元法解方程
+
+7=0,如果
=y,那么原方程可变形为( )
A.2y2-7y+6=0
B.2y2-7y-6=0
C.2y2+7y-6=0
D.2y2+7y+6=0
-
用换元法解方程
+
+7=0,如果
=y,那么原方程可变形为( )
A.2y2-7y+6=0
B.2y2-7y-6=0
C.2y2+7y-6=0
D.2y2+7y+6=0
-
(2004•海淀区)当使用换元法解方程
时,若设
,则原方程可变形为( )
A.y2+2y+3=0
B.y2-2y+3=0
C.y2+2y-3=0
D.y2-2y-3=0
-
(2004•海淀区)当使用换元法解方程
时,若设
,则原方程可变形为( )
A.y2+2y+3=0
B.y2-2y+3=0
C.y2+2y-3=0
D.y2-2y-3=0
-
(2006•双柏县)用换元法解分式方程
=7时,如果设y=
,那么将原方程化为关于y的一元二次方程的一般形式是( )
A.2y2-7y+6=0
B.2y2+7y+6=0
C.y2-7y+6=0
D.y2+7y+6=0
-
(2006•双柏县)用换元法解分式方程
=7时,如果设y=
,那么将原方程化为关于y的一元二次方程的一般形式是( )
A.2y2-7y+6=0
B.2y2+7y+6=0
C.y2-7y+6=0
D.y2+7y+6=0
-
(2006•双柏县)用换元法解分式方程
=7时,如果设y=
,那么将原方程化为关于y的一元二次方程的一般形式是( )
A.2y2-7y+6=0
B.2y2+7y+6=0
C.y2-7y+6=0
D.y2+7y+6=0
-
(2004•锦州)用换元法解方程
,若设
=y,则原方程可化为( )
A.y2-7y+6=0
B.y2+6y-7=0
C.6y2-7y+1=0
D.6y2+7y+1=0
-
(2004•锦州)用换元法解方程
,若设
=y,则原方程可化为( )
A.y2-7y+6=0
B.y2+6y-7=0
C.6y2-7y+1=0
D.6y2+7y+1=0