设X~N(1,1), Y~N(1,4), X与Y相互独立，则[img=170x46]18038d342f95fa6.png[/img] .
A: [img=54x25]18038d3438f2121.png[/img]
B: [img=54x25]18038d3442f412f.png[/img]
C: [img=42x27]18038d344aa7d87.png[/img]
D: [img=42x27]18038d34519bfc0.png[/img]
A: [img=54x25]18038d3438f2121.png[/img]
B: [img=54x25]18038d3442f412f.png[/img]
C: [img=42x27]18038d344aa7d87.png[/img]
D: [img=42x27]18038d34519bfc0.png[/img]
举一反三
- 设X~N(1,1), Y~N(1,4), X与Y相互独立，则[img=240x27]1802d3cb8cdac6f.png[/img]
- 设X~N(1,1), Y~N(1,4), X与Y相互独立，则[img=240x27]18033e160772d30.png[/img]
- 设X~N(1,1), Y~N(1,4), X与Y相互独立，则[img=240x27]18036452060e3af.png[/img]
- 设X~N(1,1), Y~N(1,4), X与Y相互独立，则[img=240x27]180393554d27ca7.png[/img]
- 设X~N(1,1), Y~N(1,4), X与Y相互独立，则[img=240x27]18039d0af8c0079.png[/img]