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Випадкову величину     задано функцією розподілу  ...

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Випадкову величину  xi

 задано функцією розподілу 

F subscript xi left parenthesis x right parenthesis equals open curly brackets table attributes columnalign left end attributes row cell table row cell 0 comma space space space space space space space space space space space space space space space space space space space space space space space x less or equal than 2 semicolon end cell row cell blank space ( x -2 ) squared comma space space space space space space space space space 2 less than x less or equal than 3 semicolon end cell end table end cell row cell space space 1 comma space space space space space space space space space space space space space space space space space space space space space space space space x greater than 3. space end cell end table close

Знайти дисперсію випадкової величини xi.

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