A continuous random variable XXX has PDF f(x)=12∣x∣e−∣x∣f(x) = \frac{1}{2}|x|e^{-|x|}f(x)=21∣x∣e−∣x∣ for x∈Rx \in \mathbb{R}x∈R. What is E[X2]E[X^2]E[X2]?
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