分解因式:xy2-x= .
考点分析:
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如图,已知A、B是反比例函数
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(k>0,x>0)图象上的两点,BC∥x轴,交y轴于点C.动点P从坐标原点O出发,沿O→A→B→C(图中“→”所示路线)匀速运动,终点为C.过P作PM⊥x轴,PN⊥y轴,垂足分别为M、N.设四边形OMPN的面积为S,P点运动时间为t,则S关于t的函数图象大致为( )
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A.
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B.
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C.
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D.
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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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如图,已知一张纸片▱ABCD,∠B>90°,点E是AB的中点,点G是BC上的一个动点,沿EG将纸片折叠,使点B落在纸片上的点F处,连接AF,则下列各角中与∠BEG不一定相等的是( )
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A.∠FEG
B.∠AEF
C.∠EAF
D.∠EFA
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如图所示几何体的俯枧图是( )
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A.
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B.
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C.
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D.
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如图,AB为⊙O的直径,PD切⊙O于点C,交AB的延长线于D,且CO=CD,则∠PCA=( )
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A.30°
B.45°
C.60°
D.67.5°
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