分解因式:a5-a= .
考点分析:
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在第一象限内的图象依次是M和N,设点P在图象M上,PC垂直于x轴于点C交图象N于点A.PD垂直于y轴于D点,交图象N于点B,则四边形PAOB的面积为( )
A.8
B.6
C.4
D.2
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A.
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D.
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A.(2n+1)
2B.(2n-1)
2C.(n+2)
2D.n
2
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如图,如果甲、乙两图关于点O成中心对称,则乙图中不符合题意的一块是( )
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D.
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D.
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