When [img=57x14]1803e238aaa2552.png[/img], which of the following sequences has a limit of e?
A: [img=89x43]1803e238b2d69c3.png[/img]
B: [img=97x43]1803e238bb429e0.png[/img]
C: [img=97x33]1803e238c33717e.png[/img]
D: [img=95x38]1803e238cc2ec72.png[/img]
A: [img=89x43]1803e238b2d69c3.png[/img]
B: [img=97x43]1803e238bb429e0.png[/img]
C: [img=97x33]1803e238c33717e.png[/img]
D: [img=95x38]1803e238cc2ec72.png[/img]
举一反三
- When [img=57x14]17de81e7b4fb95d.png[/img], which of the following sequences has a limit of e? 未知类型：{'options': ['', '', '', ''], 'type': 102}
- 设随机变量(X,Y)在区域｛(x,y): 0<|y|< x <2｝内均匀分布，则以下结果正确的是 A: 当0<x<2时，[img=96x25]1802dded7db6eef.png[/img]. B: E(X)=4/3 C: 当0<|y|<2时,[img=105x45]1802dded872b92f.png[/img]. D: P(X<1)=0.5 E: 当0<x<2时,[img=110x45]1802dded915de6e.png[/img]. F: E(X)=2/3 G: 当0<y<2时，[img=95x43]1802dded9a54300.png[/img].
- 已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ，则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]
- 设X为随机变量，若数学期望E(X)存在，则数学期望E(E(X))=__________。 A: E(X) B: 0 C: [img=51x27]18038f919d83a08.png[/img] D: [img=63x27]18038f91a6f0476.png[/img]
- 对任意随机变量X，若E(X)存在，则E( E(X))等于 A: 0 B: X C: [img=86x34]1803b3be36711aa.png[/img] D: E(X)