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某篮球运动员在一个赛季的40场比赛中的得分的茎叶图如图所示,则中位数与众数分别为...
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某篮球运动员在一个赛季的40场比赛中的得分的茎叶图如图所示,则中位数与众数分别为
、
.
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若一组数据a
1,a
2,…,a
n的平均数为4,则3a
1-1,3a
2-1,…,3a
n-1的平均数是
.
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若任意x∈A,则
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,就称集合A是“和谐”集合,则在集合
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的所有127个非空子集中任取一个集合,是“和谐”集合的概率为( )
A.
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B.
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C.
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D.
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如图所示的三角形数阵叫“莱布尼兹调和三角形”,有
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,则运用归纳推理得到第11行第2个数(从左往右数)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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边长为a的正三角形内任一点到三边距离之和为定值
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,类比到空间,棱长均为a的三棱锥内任一点到各面距离之和为( )
A.
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B.
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C.
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D.
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如图所示的算法流程图中输出的最后一个数为15,则判断框中的条件是( )
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A.n<5
B.n≥5
C.n<4
D.n≥4
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