设函数-|||-f(x)-|||-在区间-|||-(1,2)-|||-内连续,-|||-https:/img.zuoyebang.cc/zyb_dcce33fedbb879f2f73d0d083995cc16.jpglt (x)_(1)lt (x)_(2)lt (x)_(3)lt 2,-|||-证明:至少存在一点-|||-xi in (1,2)-|||-使得-|||-(xi )=dfrac (1)(3)[ f((x)_(1))+f((x)_(2))+f((x)_(3))]

2.设总体X的分布律为-|||-X 0 1 2 3-|||-p θ^2 (1-theta ) θ^2 https:/img.zuoyebang.cc/zyb_a

6.总体X的概率分布为-|||-x 0 1 2 3-|||-P θ^2 (1-0) θ^2 https:/img.zuoyebang.cc/zyb_d23f4d

https:/img.zuoyebang.cc/zyb_7951f03ce916a2297d2b38782b6a2474.jpg+(a)^2-|||-https

X=2 =0.3 , X=4 =0.5 ,则下列选项正确-|||-的是 ()-|||-A 当 https:/img.zuoyebang.cc/zyb_7f1da

设线性方程组_(1)+(x)_(2)+(x)_(3)=0-|||-x https:/img.zuoyebang.cc/zyb_11f7ffe17b3d923f0

θ^2 .https:/img.zuoyebang.cc/zyb_cc1d55810cc7d52776d9633cf4097f0a.jpg-20-|||-其中

-dfrac (2)({x)^2} .-|||-C 2x+3 ;-|||-D https:/img.zuoyebang.cc/zyb_c1dbf8c08bc60

3.设随机变量X的分布函数为-|||-F(x)=-|||-0, leqslant 0,-|||-https:/img.zuoyebang.cc/zyb_5c5f

(2)已知 P(A)=1/2 (B)=1/3 (C)=1/5, P(AB)=1/10 (AC)=1/15 (BC)=-|||-https:/img.zuoyeb

若函数f(x)在区间[1,2]上连续，且f(1) =1，f(2) =0，证明：至少存在一点varepsilon in (1,2)，使得varepsilon in