Find The Coefficient Of X K In 1 1 X 1 X 2 1 X N Suppose N ~ Poisson(a) And Given N = K, XN ~ X Find E(X) And Var(X) How Is X Distributed? 2 Suppose x n − x k ≤ n / k 2 for all n and k Show that { x n } is Cauchy Attempt Find M ∈ N st for n, k ≥ M, n / k 2 0 For given ε, let M > 1 / ε Then, for n, k ≥ M n / k 2 ≤ n / M 2 Dft x(k) of x(n) can be obtained by