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如图,平行于y轴的直线l被抛物线y=x2+1、y=x2-1所截.当直线l向右平移...
如图,平行于y轴的直线l被抛物线y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192706728703218/SYS201311011927067287032014_ST/0.png)
x
2+1、y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192706728703218/SYS201311011927067287032014_ST/1.png)
x
2-1所截.当直线l向右平移3个单位时,直线l被两条抛物线所截得的线段扫过的图形面积为
平方单位.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192706728703218/SYS201311011927067287032014_ST/images2.png)
考点分析:
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如图,已知点A在反比例函数
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的图象上,点B在反比例函数
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的图象上,
AB∥x轴,分别过点A、B作x轴作垂线,垂足分别为C、D,若
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,则k的值为
.
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在学校艺术节文艺汇演中,甲、乙两个舞蹈队队员的身高的方差分别是
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,
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,那么身高更整齐的是
队(填“甲”或“乙”).
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函数y=
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中,自变量x的取值范围是
.
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如图,⊙A与x轴交B(2,0)、C(4,0)点,OA=3,P是y轴上的一个动点,PD切⊙O于点D,则PD的最小值是( )
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A.3
B.
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C.
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D.
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