(a) Find a power series representation for f(x) (9 + x)2 (-1)"(n+1)x" f(x) = > 9"+2 n = 0 What is the radius of convergence, R? R = 9 (b) Use part (a) to find a power series representation for x3 f(x) (9 + x)2 = (n- 5)x"-3 (-9)"-4 F(x) = E n = 0 What is the radius of convergence, R? R = 11

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