Question

假设X是连续型随机变量,其密度函数为f(x)={cx²,0

Answer 1

1）F(x)=

0|x≤0

c/3·x³|x∈(0,2)

1|x≥2

∵lim(x->2) c/3·x³ = 1 ∴c/3·x³ = 1代入x=2,解得 c=3/8

2）P（-1