Question: 11 Let X be a random variable with the probability density function f(x) 1 (1+x)' Prove that E(X) converges if 0 < a <1 and

11 Let X be a random variable with the probability density function f(x) 1 (1+x)' Prove that E(X) converges if 0 < a <1 and diverges if a 1.

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