• 2022-06-26
    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 .
  • [b]解[/b]     如图所示[img=155x156]177b3e23104f289.png[/img][tex=11.214x2.429]2KmiKUYgKJCI289lPZ7nIj8WPHKYy9LaxOuiBOsBR8SdRH1kbddHfjCqU2Z1z0H0IcUeIpr7VlIrZZsji3Z0eQ==[/tex][tex=6.214x4.214]1/0/5bh78hsVDVEgaQ9Ae4g62GYs2jC9APYGlRGdGF1RYerHzkQ+AbfRwp4rDrh6KJ5wCuJRS0vb82BVGfsYtA==[/tex][tex=6.0x2.429]BUmH7NsaSKJcIycgLYAeILO11Qcn6bbzsUL++OPX/KEC/w5/hF8WsTEDe5l0l9Lm[/tex],[tex=11.143x2.429]DyHW+/Px+wb1h8q20bT96b4M3uXf4wvK8iHEY9VXDC9LZe8rtQivUqVZvnCEx5Iphdy8aMKqEU0fvsaaD65H3w==[/tex][tex=7.643x4.071]1/0/5bh78hsVDVEgaQ9Ae3Uc30wpOK/MYVz99rwdt6YOAN+P39uTPsuPYGoVvu5Hpi0+ESMH6Csr/+pOrA9GcQ==[/tex][tex=6.5x2.429]K99UBpmY/+yQC9CYk1WEEuNqg2pGSwRK2Cv4IlI3MSamE55jmP5p9/Hq5tP6xE5N[/tex]

    举一反三

    内容

    • 0

      设随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]具有概率密度函数[tex=14.429x2.429]EPaISH7F+7OFqeEao9lVbbssQfmQoaGXhVTrAwnWzHBSbJW11NpCzBs4Ap6dFzC9R5BYZdAm4TE8O87QCYABVg==[/tex][br][/br]试求:[tex=1.714x1.286]tnqXjXNHESmtAydX2nd1FQ==[/tex],[tex=1.571x1.286]9HHQOQ6kFW8m23SI56qi0g==[/tex],[tex=4.071x1.286]YpgHzrqX8+SymmLWUeeFLvG8mrOXVvst6NnXFYV7jQM=[/tex]。

    • 1

      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] .

    • 2

      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]

    • 3

      二维随机变量[tex=2.786x1.286]AG5D6gU/evQZlfwisXgzYw==[/tex]在以[tex=2.929x1.286]3y4MkSHU4CkFowioH8YmWQ==[/tex],[tex=2.143x1.286]VykF7BpO3NFT550xU7Tx1w==[/tex],[tex=2.143x1.286]xFRFgvSxDEv0XaioRgmbFw==[/tex]为顶点的三角形区域上服从均匀分布,求[tex=4.929x1.286]bstb6Acm/GnARrPc8f1uPw==[/tex]的概率密度。

    • 4

      设二维随机变量[tex=2.643x1.357]QbFpvZz7OZIduX8Rz8+xAw==[/tex]的联合概率密度为[tex=16.0x2.429]EPaISH7F+7OFqeEao9lVbfcmftvU0BW+8v1ntUyFO1g6zTeBlmVly8TPLV0kkJXX5XG5GabVw3XFApb1yeVZy3dG2ug1KEoIx5SKwXhzz6c=[/tex]求边缘概率密度.