# Question

If we let RX(t) = lnMX(t), show that R'X(0) = µ and R''X(0) = σ2. Also, use these results to find the mean and the variance of a random variable X having the moment- generating function

MX(t) = e4(e4 – 1)

MX(t) = e4(e4 – 1)

## Answer to relevant Questions

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