1-6 For each of the following functions, find a power series representation of the function, and find the radius of convergence of the power series. 7. 5. f(x) = 1+3 1 x2 2. f(x) =1-x 4. f(x) = 2x + 6

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A: Expand to obtain the square of the given term and use quadratic formula to obtain the roots.

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