方程x(x-1)=x的根是 .
考点分析:
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已知二次函数y=x
2-x+
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,当自变量x取m时,对应的函数值小于0,当自变量x取m-1、m+1时,对应的函数值为y
1、y
2,则y
1、y
2满足( )
A.y
1>0,y
2>0
B.y
1<0,y
2>0
C.y
1<0,y
2<0
D.y
1>0,y
2<0
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如图,在△ABC中,已知∠A=90°,AB=AC=2,O为BC的中点,以O为圆心的圆弧分别与AB、AC相切于点D、E,则图中阴影部分的面积( )
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A.1-
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B.
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C.1-
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D.2-
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反比例函数y=
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图象上有三个点(x
1,y
1),(x
2,y
2),(x
3,y
3),其中x
1<x
2<0<x
3,则y
1,y
2,y
3的大小关系是( )
A.y
1<y
2<y
3B.y
2<y
1<y
3C.y
3<y
1<y
2D.y
3<y
2<y
1
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将点A(4,0)绕着原点O顺时针方向旋转60°角到对应点A′,则点A′的坐标是( )
A.(4,-2)
B.(2,
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C.(2,
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)
D.(
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,-2)
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