设二维随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的概率密度为[tex=7.857x2.429]TwQY3AidEBWrIKXq4bsgftVXMOpm48Hzp0zOtVCmPHTfSHnsF24oLNKIsXiAHToY[/tex],求边缘概率密度 .
举一反三
- 设二维随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]在以原点为圆心,[tex=0.786x1.286]yokTf2U2Z7kNGUXMm22GjQ==[/tex]为半径的圆上服从均匀分布,试求[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的联合概率密度及边缘概率密度。
- 设二维随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的联合密度函数为[tex=17.643x3.643]lJblPB9MNpIrc6Sy3BdmFY0caaqrhqD4gwf+7QHot1rtfDUbpZzDYIJpx7nOrjGBNlWIGzSwLVMYVwJL3s4HaWBEvp77HHTqJ+MR3njJsBk=[/tex]求 [tex=4.929x1.286]bstb6Acm/GnARrPc8f1uPw==[/tex] 的密度函数.
- 设二维随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的联合密度函数为[tex=16.714x4.786]lJblPB9MNpIrc6Sy3BdmFXJ0yfI4z+iB1nKJ7ROgWqzozTSmjcWBy4nK0qyrzRF+fp3JGr/6aI4tBX1cWLqkSZrOFvj/j80GqJYiLKrdxYXigp4zN34F6WQaHjyImTzH9KJpwLReFhK53LOUn9wn1Q==[/tex]求 [tex=11.071x1.357]lBv1hWdvvhZJGLvvUAYaKANuRisY6FOdORXdyZ/VvmB/d8xeqo9XbhIOUtx7b8nWZG6WLgRPobZqyCE4jDJR/g==[/tex]
- 设二维随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的联合密度函数为[p=align:center][tex=18.786x3.643]lJblPB9MNpIrc6Sy3BdmFTulnCSmzPh4E9xtF58toUCeK0TiyLWgTM9bJi3NqT2iMczjkKX1Q/Fre0z38dI9idnd/d01g0kUlwKQnBjmruYCuWyAPx5D0Mn+UYGqiADP[/tex]求 [tex=4.929x1.286]bstb6Acm/GnARrPc8f1uPw==[/tex] 的密度函数.
- 设随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的概率密度为[tex=15.5x2.429]a9neBZVmd3fG0ctvwI5OxteIj4XvvqcMGMa5noJ365MrQ9Y2idFZaVToTeCUrbZfeHH5v7ivVR8qvw6yykdvYA==[/tex],试确定常数[tex=0.571x1.286]pc/qlnA3cxu8Ag9jp3tYHQ==[/tex],并求[tex=3.143x1.286]emZwm5s4Y8ZqbhwKGbddlw==[/tex] .