相关试题
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解方程=3时.设y=,则原方程化为y的整式方程为( )
A.3y2-y+1=0
B.y2+3y-1=0
C.y2-3y+1=0
D.3y2+y-1=0
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解方程,若设,则原方程化为( )
A.3y2+5y-4=0
B.3y2+y-10=0
C.3y2+5y+2=0
D.3y2+5y-2=0
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用换元法解分式方程3x2+3x=+1,若设x2+x=y,则原方程可化为关于y的整式方程( )
A.3y2-y-2=0
B.3y2+y+2=0
C.3y2+y-2=0
D.3y=+1
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用换元法解方程时,设,则原方程变为( )
A.3y2+2y-7=0
B.3y2+2y-5=0
C.3y2+2y-2=0
D.3y2+2y+1=0
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(2002•盐城)解方程,设y=x+,那么原方程变形为( )
A.y2-3y=0
B.y2-3y+2=0
C.y2-3y-4=0
D.y2-3y+4=0
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(2002•盐城)解方程,设y=x+,那么原方程变形为( )
A.y2-3y=0
B.y2-3y+2=0
C.y2-3y-4=0
D.y2-3y+4=0
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(2005•沈阳)用换元法解分式方程3x2+3x=+1,若设x2+x=y,则原方程可化为关于y的整式方程( )
A.3y2-y-2=0
B.3y2+y+2=0
C.3y2+y-2=0
D.3y=+1
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(2005•沈阳)用换元法解分式方程3x2+3x=+1,若设x2+x=y,则原方程可化为关于y的整式方程( )
A.3y2-y-2=0
B.3y2+y+2=0
C.3y2+y-2=0
D.3y=+1
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用换元法解方程时,设,则原方程可变形为( )
A.y2-3y+2=0
B.2y2-3y+1=0
C.y2+3y-2=0
D.2y2+3y-1=0
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(2005•黄石)解方程-3=0,如果设=y,那么原方程可化为( )
A.y2+3y+2=0
B.y2-3y+2=0
C.y2+3y-2=0
D.y2-3y-2=0