Ononot — Given f(x) = \sum{n=0}^{\infty} cn x^n has a radius of conve

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Power Seriesmedium

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Given $f(x) = \sum_{n=0}^{\infty} c_n x^n$ has a radius of convergence $R_1$ and $g(x) = \sum_{n=0}^{\infty} d_n x^n$ has a radius of convergence $R_2$ , what is the radius of convergence $R$ for the sum series $h(x) = \sum_{n=0}^{\infty} (c_n + d_n) x^n$ ?