分解因式:a3-ab2= .
考点分析:
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如图,在平面直角坐标系中,⊙P的圆心是(2,a)(a>2),半径为2,函数y=x的图象被⊙P截得的弦AB的长为
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,则a的值是( )
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A.2
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B.2+
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C.2
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D.2+
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在同一直角坐标系中,一次函数y=ax+c和二次函数y=ax
2+bx+c的图象大致为( )
A.
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B.
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C.
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D.
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下列四个结论中,正确的是( )
A.方程x+
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=-2有两个不相等的实数根
B.方程x+
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=1有两个不相等的实数根
C.方程x+
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=2有两个不相等的实数根
D.方程x+
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=a(其中a为常数,且|a|>2)有两个不相等的实数根
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如图,已知△ABC中,∠ABC=90°,AB=BC,三角形的顶点在相互平行的三条直线l
1,l
2,l
3上,且l
1,l
2之间的距离为2,l
2,l
3之间的距离为3,则AC的长是( )
A.
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B.
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C.
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D.7
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