二次型[img=144x20]18034e63d6d1242.png[/img]的规范型为( ).
A: [img=102x27]18034e63df29f02.png[/img]
B: [img=93x27]18034e63e7e3bcb.png[/img]
C: [img=93x27]18034e63f0ac46c.png[/img]
D: [img=93x27]18034e63f956c9d.png[/img]
A: [img=102x27]18034e63df29f02.png[/img]
B: [img=93x27]18034e63e7e3bcb.png[/img]
C: [img=93x27]18034e63f0ac46c.png[/img]
D: [img=93x27]18034e63f956c9d.png[/img]
举一反三
- 设随机变量X~B(3, 0.4),[img=102x27]18037032d38dcea.png[/img], 则P(Y=1)的值为 A: 0.504 B: 63/125 C: 0.432 D: 0.288 E: 0.496 F: 27/125 G: 36/125 H: 4/25
- 设随机变量X~B(3, 0.4),[img=102x27]1802d3ec87fec7a.png[/img], 则P(Y=1)的值为 A: 0.504 B: 63/125 C: 0.432 D: 0.288 E: 0.496 F: 27/125 G: 36/125 H: 4/25
- 设随机变量X~B(3, 0.4),[img=102x27]1802d3e98bc8803.png[/img], 则P(Y=1)的值为 A: 0.504 B: 63/125 C: 0.432 D: 0.288 E: 0.496 F: 27/125 G: 36/125 H: 4/25
- 随机变量X服从参数为2的泊松分布,F(x)是X的分布函数,则以下结果正确的是 A: [img=84x27]1803915dd0fa1fd.png[/img] B: [img=98x27]1803915dd94baf2.png[/img] C: [img=107x27]1803915de1b0af0.png[/img] D: [img=107x27]1803915de9da123.png[/img] E: [img=82x25]1803915df33a2e2.png[/img] F: [img=93x27]1803915dfc23b5b.png[/img] G: [img=93x27]1803915e0456f39.png[/img] H: [img=82x25]1803915e0bba078.png[/img] I: [img=129x27]1803915e1388fad.png[/img]
- 随机变量X服从参数为2的泊松分布,F(x)是X的分布函数,则以下结果正确的是 A: [img=84x27]1802d3e8d3a4abc.png[/img] B: [img=98x27]1802d3e8db73b68.png[/img] C: [img=107x27]1802d3e8e3777dc.png[/img] D: [img=107x27]1802d3e8ec6fc6e.png[/img] E: [img=82x25]1802d3e8f4cd368.png[/img] F: [img=93x27]1802d3e8fd97575.png[/img] G: [img=93x27]1802d3e905768e1.png[/img] H: [img=82x25]1802d3e90d52c74.png[/img] I: [img=129x27]1802d3e91580a21.png[/img]