A.3
B.2
C.1
D.8
[试题]5,9,14,23,37,()A..36B..48C..60D..64
设随机变量sim N(1,4),则sim N(1,4)(已知sim N(1,4),sim N(1,4)) sim N(1,4)sim N(1,4)sim N(1
sim N(-1,4)sim N(-1,4)sim N(-1,4)sim N(-1,4)设随机变量,则3)" data-width="88" data-heig
已知随机变量sim N(-1,9) sim N((1,4)^2),且X与Y相互独立,则sim N(-1,9) sim N((1,4)^2),( )A sim
[单选题]3,1,4,1,5,9,(),6。A.1B.2C.3D.4
[单选题]:1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
[单选题]1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
113函数 =sqrt (lg (dfrac {5x-{x)^2}(4))} 的定义域为() ()-|||-() [ -1,1] -|||-()0 [1,4]-
若二维随机变量(5,n)sim N(0,0;1,4;dfrac (1)(3)),则(5,n)sim N(0,0;1,4;dfrac (1)(3))A.4B.6C
设 3-|||-A= 4 5 6-|||- 9, 3-|||-A= 4 5 6-|||- 9且 3-|||-A= 4 5 6-|||- 9, 则 3-|||-