X是随机变量,其分布函数为,则X为落在内的概率。/sqp/img?f=ef9fff84cb6806f93f3977617fd06e32.files%2Fimage001.pnghttps://p.ananas.chaoxing.com/star3/origin/10ffbaeb0acc1fe577542ecb859cc9ae.png/sqp/img?f=ef9fff84cb6806f93f3977617fd06e32.files%2Fimage010.png
举一反三
- 已知函数f(x)=,则f(0)+f(-1)=[ ]A、9
- 设,其中;又 其中,试利用二重积分的几何意义说明与之间的关系./sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage009.pnghttps://p.ananas.chaoxing.com/star3/origin/754ba804b45e87e6f578aa3617bebf06.png/sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage011.png/sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage012.pnghttps://p.ananas.chaoxing.com/star3/origin/c9d52b4692fa648970aeba85853ee9a0.png/sqp/img?f=2f17fe58198a286af46cfbf48ec2d04d.files%2Fimage014.png
- 设[img=143x35]1803b3baa24b1c3.png[/img],其密度函数为f(x),分布函数为F(x),则 A: P(X<0)=P(X>0) B: P(X<1)=P(X>1) C: F(−x)=1−F(x) D: f(−x)=f(x)
- 设随机变量[img=93x25]180327943b4d5c6.png[/img],分布函数为F(x),密度函数为f(x),则有( ) A: P(X<0)=P(X>0) B: f(x)=f(-x) C: P(X<1)=P(X>1) D: F(x)=F(-x)
- 设随机变量[img=93x25]1803da321872708.png[/img],分布函数为F(x),密度函数为f(x),则有( ) A: P(X<0)=P(X>0) B: f(x)=f(-x) C: P(X<1)=P(X>1) D: F(x)=F(-x)