设 [tex=1.714x1.214]iQ/iEbsDm/5Je+BSznZxUQ==[/tex] 存在,且 [tex=4.0x1.5]xIOgjjqRxMw/hqzLeAemXA==[/tex], 则 [tex=3.929x1.571]deak5d3KtYXQ8JGw+HvMYr/YmplS0KrS/6TDEIrHFPE=[/tex][input=type:blank,size:6][/input]
举一反三
- 设 [tex=7.571x1.5]X32BZkoASxbtb2aaoJs9nwAvjYcMuPJUvFsmJHSoMdA=[/tex] 则 [tex=3.714x1.357]jTuwFgZbVUVcMCQxXMCSFg==[/tex][input=type:blank,size:6][/input], [tex=3.714x1.357]dlNw340IBx3UQOWcQr2QgA==[/tex][input=type:blank,size:6][/input]
- 设随机变量X服从标准正态分布,X~N(0,1),则[tex=4.357x1.357]N96gAKyTxAFJGbzY6VEFhgJk69lxWJAsOnu5yxPIE60=[/tex][input=type:blank,size:6][/input].
- 若 [tex=9.286x2.643]MX3luL+2gUi5XZA1DJzoI6kGxCHxUevRjQ9NaZUOQco=[/tex] 则 [tex=5.857x2.143]CPrstOo4BL/tjTas7Ov4co1tDqaT3/gaEBG7M40UE4A=[/tex][input=type:blank,size:6][/input], [tex=2.929x1.286]bxDJBD1eh7UoKfKs5gMhsA==[/tex][input=type:blank,size:6][/input], [tex=3.214x1.286]nOJBJucVwlQuHq02hM9Tso8zsX+SbW2GYgy/qe8Etic=[/tex][input=type:blank,size:6][/input].
- 设 [tex=7.786x1.357]tlkYZPXRxZEDfXxV7yXshknQaVwfVeqTIgAS1Y6cFas=[/tex], 且 [tex=5.143x1.143]vIoIF5/XALHvQTUrZgGrog==[/tex], 则 [tex=9.357x1.357]q2pt2OUg95gebbL8gzJ248EUYir+15RHtJrHifOUSXxSWAO3UceZx3xrZA7bFXtC[/tex][input=type:blank,size:6][/input]
- 设随机变量 [tex=0.929x1.286]uswT/CEcOIwMpCvTz/zeaA==[/tex] 服从参数 [tex=3.143x1.286]+YbFeYrJMNsGfJf0KraF7SPelDX5xgqsp9CtXCLBwA8=[/tex] 的指数分布,则 E(X)= [input=type:blank,size:4][/input], D(X) =[input=type:blank,size:4][/input].