• 2022-06-17
    设二维随机变量[tex=2.5x1.357]PWg5V4GQQafckGNgbx6gmw==[/tex]的联合密度函数为[tex=15.786x3.357]k577xRm0ZOCUJhn0k/ylevdeQMRjBzLLf+gr+H41+NCJFieJ/hDl6Fw4YJaId4uRR+XQ9h6ic6B/zr/OJGgt1pgA/KVkSna1HxQzZY2n3IGa2SIgMhiTnzRTy3vDqo1WI/6Zk6wTmMBfrNqbsKd8UA==[/tex]试求边际密度函数[tex=2.286x1.357]zSDTlsm7JRcFsxGam0EgRg==[/tex]和[tex=2.143x1.357]V59RoF1dxPh1udh4MqkqXA==[/tex].