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<p>设X的概率密度<img alt="" src="https://learnfile.20230611.cn/learnAp
分类: 数学2 (军队文职)
发布时间: 2023-11-03 09:29
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设X的概率密度
B.1/2
C.-1/2
D.1
正确答案是A
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