在间断点处，傅里叶积分收敛到
A: [img=143x45]180332bf1dc6e9f.png[/img]
B: [img=143x25]180332bf259dce6.png[/img]
C: [img=81x45]180332bf2dd08ab.png[/img]
D: [img=143x45]180332bf362face.png[/img]
A: [img=143x45]180332bf1dc6e9f.png[/img]
B: [img=143x25]180332bf259dce6.png[/img]
C: [img=81x45]180332bf2dd08ab.png[/img]
D: [img=143x45]180332bf362face.png[/img]
举一反三
- ${\rm var}(X)=\,$ ${\bf E}[X]=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
- ${\bf P}(X=4)=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=2)=\,$ ${\bf P}(X=1)=\,$______
- ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
- ${\bf P}(X=2)=\,$ ${\bf P}(X=1)=\,$______
- 设随机变量X的密度函数为[img=143x45]17da633abc23774.png[/img]常数[img=43x19]17da633ad2c4d6c.png[/img].( )