一个图象不经过第二,四象限的反比例函数的解析式为 .
考点分析:
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已知点(1,-2)在反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305009_ST/0.png)
的图象上,则k=
.
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若M(-4,y
1)、N(-2,y
2)、P(2,y
3)三点都在函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305008_ST/0.png)
(k<0)的图象上,则y
1,y
2,y
3的大小关系为( )
A.y
2>y
3>y
1B.y
2>y
1>y
3C.y
3>y
1>y
2D.y
3>y
2>y
1
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如图是三个反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305007_ST/0.png)
,y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305007_ST/1.png)
,y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305007_ST/2.png)
在x轴上方的图象,由此观察得到k
1,k
2,k
3的大小关系为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305007_ST/images3.png)
A.k
1>k
2>k
3B.k
3>k
2>k
1C.k
2>k
3>k
1D.k
3>k
1>k
2
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在同一个直角坐标系中,函数y=kx和
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305006_ST/0.png)
的图象的大致位置是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305006_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305006_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305006_ST/images3.png)
D.
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在匀速运动中,路程S(千米)一定时,速度v(千米/时)关于时间t(小时)的函数图象大致是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305005_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305005_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000027609830502/SYS201311030000276098305005_ST/images2.png)
D.
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