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.
举一反三
- 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.
- 设随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的联合密度函数为[p=align:center][tex=14.143x3.643]lJblPB9MNpIrc6Sy3BdmFUO0inJrAJ+S9rWSLKaoQEwZArhdhamjfsTonNCB7tgOdWR/hKgLvbpk95zxo1Qj2FZaPRkK91X1tSDU6k59qEM=[/tex]求 [tex=4.286x1.357]n/CQ18GUhnUVt9w6H4KtW2FiusirI7U4IIl2+H1BcqE=[/tex] .
- 设随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]的联合密度函数为[p=align:center][tex=12.643x3.643]lJblPB9MNpIrc6Sy3BdmFblHfEN66pBcu0QuHw83KIQ3cdudKq3vlH+DZ0H6zdGeW8uEDxfKFdi4ReFZRbtgP/bVRWUbaN7hKPugDB3/GcI=[/tex]求 [tex=9.429x1.357]3mx/zSqcilpFkVvGSt6vqzwBxGF2wXRFoaQYFr/1xmy0RxXWtAvv9CRYSZFadaLG[/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=15.786x3.643]lJblPB9MNpIrc6Sy3BdmFeZj3i1/SIQqtc8pMJ8ekw0hpO2JWjN0KbCNGW8p7yRliuhj4gEfxKVKP0sL93PRo5jyEZZ6oxEqRp+wTTwwCB/5Jf4bZ/9nPNisFlUzHOxo[/tex]求常数[tex=0.571x1.286]mRKL/orzOudCEARA8qn3Kw==[/tex]和联合分布函数[tex=3.0x1.286]GOR0R/NCj/M/hw3l3obOPw==[/tex].
- 设二维随机变量 [tex=2.786x1.286]wsm6hZKLwoHLmpiSvjoPLA==[/tex] 的联合密度函数为[p=align:center][tex=15.571x4.786]lJblPB9MNpIrc6Sy3BdmFXJ0yfI4z+iB1nKJ7ROgWqwW7RfhYrJD2clUF+Zi5Z5Vj03Az45w8YqQA9BOPr6Gx2H3LLS1ZwZydXnPAMjYEP1naG7dmgkBfuhE6Rak1UqYwGVgQWserSotntBbc7vVqg==[/tex]求[tex=3.714x1.286]R3Y9cXFg+UXi4JPn32+gxA==[/tex]的密度函数.