4. Find the power series representation of the form Σ=o arn where f(x) 7 2 + x f(x) = a) Σ n=0 7·χη 2n+1 work? Ο b) n=0 (-1)" 7.xn 2n+1 c) n=0 = α 1-r for the following function: (-1)" 7.xn 2n ΕΣ n=0 7.xm 2n n

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