已知[img=41x27]180345beaacd3da.png[/img]为非零向量,且满足[img=142x28]180345beb2c3024.png[/img], 则必有
A: [img=78x25]180345bebacf53a.png[/img]
B: [img=78x25]180345bec3c24ed.png[/img]
C: [img=69x23]180345becc7b084.png[/img]
D: [img=78x25]180345bed5288ca.png[/img]
A: [img=78x25]180345bebacf53a.png[/img]
B: [img=78x25]180345bec3c24ed.png[/img]
C: [img=69x23]180345becc7b084.png[/img]
D: [img=78x25]180345bed5288ca.png[/img]
举一反三
- 已知[img=41x27]180345beaacd3da.png[/img]为非零向量,且满足[img=142x28]180345beb2c3024.png[/img], 则必有 未知类型:{'options': ['', '', '', ''], 'type': 102}
- 设随机变量X的可能取值为 [img=60x22]1803be456f12413.png[/img] 已知[img=201x25]1803be45797d541.png[/img] 则 [img=78x25]1803be45825e644.png[/img] . A: 1/3 B: 1/4 C: 1/2 D: 1/6
- 设随机变量X的可能取值为 [img=60x22]1803be44b08c71f.png[/img] 已知[img=201x25]1803be44ba37dbe.png[/img] 则 [img=78x25]1803be44c2aabcb.png[/img] . A: 1/3 B: 1/4 C: 1/2 D: 1/6
- 已知[img=41x27]17de8e7d4949ccb.png[/img]为非零向量,且满足[img=142x28]17de8e7d5585dfb.png[/img], 则必有 未知类型:{'options': ['', '', '', ''], 'type': 102}
- 设随机变量X服从标准正态分布[img=56x25]1803b69322dcdbf.png[/img],则[img=78x25]1803b6932b92131.png[/img]为 A: 0.48 B: 0.52 C: 0.5 D: 0.58