help! Find the expectation of a discrete random variable X whose probability function is given by f(x) = (1/2)x x=1,2,3,...

Question

Question

A random variable X has the density function f(x) = c/(x2+1)

where (a) Find the value of the constant c. (b) Find the probability that X² lies between 1/3 and 1.

math Statistics-And-Probability

Answer 1

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