已知[img=241x34]17da5c90f939f96.jpg[/img]求[img=57x19]17da5c91060fc2b.jpg[/img]=______(用分式x/y表达)
举一反三
- 已知单线激光雷达数据点(ρ, θ)=(10,30°),计算x、y: A: [img=118x28]18036c00fcf56fb.png[/img] B: [img=118x28]18036c010630126.png[/img] C: x= 5, y=5 D: x=10, y=5
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]1803395a2674391.png[/img],[img=39x25]1803395a2e884db.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]1803395a3774627.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]1803395a4011789.png[/img] D: [img=49x49]1803395a48d6475.png[/img]
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]1802f2b2d860f7f.png[/img],[img=39x25]1802f2b2e0c7729.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]1802f2b2e8413e8.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]1802f2b2f0bb048.png[/img] D: [img=49x49]1802f2b2f8f8703.png[/img]
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]180380ab56c2763.png[/img],[img=39x25]180380ab5f656f8.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]180380ab67c0587.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]180380ab712dddf.png[/img] D: [img=49x49]180380ab79d6df8.png[/img]
- 设二维随机变量(X,Y)的概率密度为f (x,y),[img=44x25]1802f2af7ef6df7.png[/img],[img=39x25]1802f2af8888765.png[/img]分别表示X,Y的概率密度,则在Y = y的条件下,X的条件概率密度[img=69x27]1802f2af916992b.png[/img]为( ). A: f X(x) B: f Y(y) C: [img=49x49]1802f2af9a4f19e.png[/img] D: [img=49x49]1802f2afa35486e.png[/img]