Question: Determine the characteristic function of the random variable X, which has the exponential distribution X~E{}, and derive mean and variance of X using the fact

Determine the characteristic function of the random variable X, which has
the exponential distribution X~E{}, and derive mean and variance of X using

Determine the characteristic function of the random variable X, which has the exponential distribution X~E{}, and derive mean and variance of X using the fact that the characteristic function is a moment-generating function

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