满分5 >
初中数学试题 >
(2006•辽宁)用换元法解分式方程,若设,则原方程可化为关于y的整式方程是( ...
(2006•辽宁)用换元法解分式方程
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899005_ST/0.png)
,若设
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899005_ST/1.png)
,则原方程可化为关于y的整式方程是( )
A.y
2-3y-2=0
B.3y
2-2y-1=0
C.3y
2-y+2=0
D.y
2-2y-3=0
考点分析:
相关试题推荐
(2009•甘孜州)一辆汽车由A地匀速驶往相距300千米的B地,汽车的速度是100千米/小时,那么汽车距离A地的路程S(千米)与行驶时间t(小时)的函数关系用图象表示为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899004_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899004_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899004_ST/images2.png)
D.
查看答案
(2006•辽宁)若方程x
2-3x+1=0的两个实数根为x
1,x
2,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899003_ST/0.png)
的值是( )
A.3
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899003_ST/1.png)
C.-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899003_ST/2.png)
D.-3
查看答案
(2006•辽宁)在Rt△ABC中,∠C=90°,sinA=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899002_ST/0.png)
,则cosB的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899002_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899002_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899002_ST/3.png)
D.
查看答案
(2006•辽宁)当x≤0时,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110226558089967/SYS201310191102265580899001_ST/0.png)
的值为( )
A.0
B.-
C.
D.±
查看答案
(2006•辽宁)在平面直角坐标系中,位于第三象限的点是( )
A.(0,-1)
B.(1,-2)
C.(-1,-2)
D.(-1,2)
查看答案