设矩阵[img=140x63]18037208d97197c.png[/img],则[img=54x23]18037208e1fcfa7.png[/img][img=111x63]18037208eaa15f7.png[/img]
对
举一反三
- 设矩阵[img=140x63]180330617e6bb3c.png[/img],则[img=54x23]1803306186e021c.png[/img][img=111x63]18033061963d71e.png[/img]
- 设矩阵[img=140x63]180330633bcd7e3.png[/img],则[img=54x23]1803306344bcceb.png[/img][img=111x63]180330634c28fb7.png[/img]
- 设矩阵[img=140x63]1803970a0568256.png[/img],则[img=54x23]1803970a0d668b6.png[/img][img=111x63]1803970a1aa8109.png[/img]
- 设X,Y为两个随机变量,且[img=179x25]1803395d555effc.png[/img] , [img=226x25]1803395d61f1a43.png[/img] ,则[img=143x25]1803395d6f00057.png[/img]= ( ). A: 1/7 B: 3/7 C: 4/7 D: 5/7
- 设f(x)是连续函数,且[img=115x41]17e441a9264b227.jpg[/img],则f(7)=. 未知类型:{'options': ['0', ' [img=11x33]17e4362bee12768.jpg[/img]', ' [img=18x33]17e43d9ae21f42d.jpg[/img]', ' 1'], 'type': 102}
内容
- 0
设随机变量X的概率密度为f(x),则f(x)一定满足( ). A: 0≤f(x)≤1 B: [img=183x53]1803b451bb3373a.png[/img] C: [img=133x51]1803b451c807078.png[/img] D: f(+∞)=1
- 1
设f(x)=[img=15x18]17da42685cb8d76.jpg[/img],则f【f'(x)】=
- 2
设矩阵[img=140x63]1803e0f50908899.png[/img],则[img=160x115]1803e0f513c4786.png[/img]
- 3
设矩阵[img=140x63]1803306081d4926.png[/img],则[img=160x115]180330608c49331.png[/img]
- 4
设矩阵[img=140x63]180397096e7cfb3.png[/img],则[img=160x115]180397097a0fba1.png[/img]