Question: let X be a discrete random variable with pff p(x)=1/3*(2/3)^(x-1) for x=1,2,3,... find moment generating function find expected value of X find variance of X

let X be a discrete random variable with pff p(x)=1/3*(2/3)^(x-1) for x=1,2,3,...

  1. find moment generating function
  2. find expected value of X
  3. find variance of X

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