将分式
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化简,结果为
.
考点分析:
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函数
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的自变量x的取值范围是
.
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如图,矩形纸片ABCD中,AB=4,AD=3,折叠纸片使AD边与对角线BD重合,折痕为DG,则AG的长为( )
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A.1
B.
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C.
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D.2
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如图,是一个几何体的三视图,根据图中标注的数据可求得这个几何体的体积为( )
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A.24π
B.32π
C.36π
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如图,在矩形ABCD中,动点P从点B出发,沿BC、CD、DA运动至点A停止,设点P运动的路程为x,△ABP的面积为y,如果y关于x的函数图象如图所示,则△ABC的面积是( )
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C.18
D.20
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某旅游景点三月份共接待游客25万人次,五月份共接待游客64万人次,设每月的平均增长率为x,则可列方程为( )
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2=64
B.25(1-x)
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C.64(1+x)
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