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    Independent random variable

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    I am having trouble with a few characteristic functions, as described in the attachment. Any help would be greatly appreciated.

    The attachment contains a definition of what I mean by a characteristic function.

    Thank you!

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    Solution Summary

    Let X1....Xn be n independent random variables of uniform continuous
    distribution on the interval [-1 ; 1].
    In other words, their distribution is ......
    Where is their characteristic function.