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直线y=(3-a)x+b-2在直角坐标系中的图象如图所示,化简:= .
直线y=(3-a)x+b-2在直角坐标系中的图象如图所示,化简:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193500323747859/SYS201311011935003237478012_ST/0.png)
=
.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193500323747859/SYS201311011935003237478012_ST/images1.png)
考点分析:
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已知:如图,在直角坐标系中,有菱形OABC,A点的坐标为(10,0),对角线OB、AC相交于D点,双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193500323747859/SYS201311011935003237478009_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193500323747859/SYS201311011935003237478009_ST/1.png)
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④AC+OB=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193500323747859/SYS201311011935003237478009_ST/3.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193500323747859/SYS201311011935003237478009_ST/images4.png)
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