题目内容
（请给出正确答案）
(1) 设随机变量X的概率密度为
求(i)Y=2X；(ii)Y=e-2X的数学期望．
(2) 设随机变量X1，X2，…，Xn相互独立，且都服从(0，1)上的均匀分布(i)求U=max{X1，X2，…，Xn}的数学期望，(ii)求V=min{X1，X2，…，Xn}的数学期望．
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更多“（1) 设随机变量X的概率密度为 求（i)Y=2X；（ii)…”相关的问题
第1题
According to the passage, you make an American person feel uncomfortable if .
A．you meet his eyes friendly
B．avoid meeting his eyes
C．stare into his eyes for one second
D．look into his eyes for a long time
第2题
A．and
B．that
C．for which
D．in fact
第3题
Which of the following shows that a person is NOT dreaming in his sleep？
A．His eyes begin to move.
B．His breathing becomes faster.
C．His heart rate increases.
D．His eyes stop movin
第4题
Which of the following shows that a person is NOT dreaming in his sleep？
A.His eyes begin to move．
B.His breathing becomes faster．
C.His heart rate increases．
D.His eyes stop moving．
第5题
When we talk about his new grandson, his eyes ______ with delight.
A．gleam
B．flash
C．sparkle
D．twinkle
第6题
When we listen to a person talking, the most important thing for us is to ______.
A．notice the way the person is talking
B．take a good look at the person talking
C．mind his tone, his posture and the look in his eyes
D．examine the real meaning of what he says based on his manner, his tone and his posture
第7题
When we listen to a person talking, the most important thing for us to do is______.
A．notice the way the person is talking
B．take a good look at the person talking
C．mind his tone, his posture and the look in his eyes
D．examine the real meaning of what he says based an his manner, his tone and his posture
第9题
When we listen to a person talking, the most important thing for us to do is______.
A．notice the way the person is talking
B．take a good look at the person talking
C．mind his tone, his posture and the look in his eyes
D．examine the real meaning of what he says based on his manner, his tone and his posture
第10题
A．notice the way the person is talking
B．take a good look at the person talking
C．mind his tone, his posture and the look in his eyes
D．examine the real meaning of what he says based on his manner, his tone and his posture
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