设 f(x) 和 F(x) 分别是随机变量X 的分布密度函数和分布函数,则对任意a<b,有()
[img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605152155_52750.png" alt="" />
A.F (a) -F (b)
B.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0605/1591341797742603.png" />
C.[img src="https://img.haodaxue.net/uploadimg/ico/2020/0605/1591341802690316.png" />
D.f (b) -f (a)
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正确答案: B 答案分析:无
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