# Independent random variable

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.

$2.19