8. 函数[img=64x27]180351c86027b32.png[/img](a为实数),则[img=70x44]180351c8682f800.png[/img]为()
A: [img=40x40]180351c8715bd29.png[/img]
B: [img=40x40]180351c8795ec2c.png[/img]
C: [img=32x40]180351c880bb0d5.png[/img]
D: [img=40x40]180351c889022f9.png[/img]
A: [img=40x40]180351c8715bd29.png[/img]
B: [img=40x40]180351c8795ec2c.png[/img]
C: [img=32x40]180351c880bb0d5.png[/img]
D: [img=40x40]180351c889022f9.png[/img]
举一反三
- 设[img=162x19]17e0ab913cc7ca8.jpg[/img]且X,Y相互独立,则[img=84x19]17e0ab9147a14b0.jpg[/img]. A: 14 B: 22 C: 32 D: 40
- 8. 函数[img=64x27]180351c86027b32.png[/img](a为实数),则[img=70x44]180351c8682f800.png[/img]为() 未知类型:{'options': ['', '', '', ''], 'type': 102}
- X~N(1,1), 密度函数为[img=37x25]18038fe689205b5.png[/img], 分布函数为F(x), 则( ) A: [img=198x25]18038fe690a03ee.png[/img] B: [img=101x25]18038fe69af96aa.png[/img] C: [img=67x25]18038fe6a3b8e5b.png[/img][img=118x25]18038fe6ab93d6f.png[/img] D: F(x)=F(-x)
- 设随机变量X的密度函数f(x)满足f(-x)= f(x),F(x)为X的分布函数,则对任意实数a,下列结论成立的是( ) A: [img=188x49]1803bb15a4e233e.png[/img] B: [img=186x49]1803bb15aeb6ced.png[/img] C: [img=107x25]1803bb15b6bde3a.png[/img] D: [img=147x25]1803bb15bfab702.png[/img]
- 设连续型随机变量X的概率密度函数为f(x),分布函数为F(x),则对任意实数a,( ) A: [img=134x25]18035d8b1ab1984.png[/img] B: [img=100x25]18035d8b22c648d.png[/img] C: [img=114x25]18035d8b2b21f9a.png[/img] D: [img=131x25]18035d8b33a2006.png[/img]