• 2022-06-04
    设二维随机变量 [tex=2.643x1.357]DJUMdJyw8QoCXHzomLtAYg==[/tex] 的联合密度函数为[tex=11.214x2.929]dP4cQckxhVALWt3v5f2JJjWK/stm4yhCuvlSJ6VDu9hxdhvPYPTt6NODS5Ia7t4+l4XUILYhbpri+riFUyxps8sbnmxil1mOMW+6ofy1LNc=[/tex]试求 [tex=5.429x1.357]D860cjazeUYeZ5aHFFLtW1Qq33FXkzeHuIIgL+gFJUo=[/tex]