need help finding the domain of letter c and d [ f(x)=5 x^{2}+10 x quad g(x)=frac{1}{5 x}

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need help finding the domain of letter c and d \[ f(x)=5 x^{2}+10 x \quad g(x)=\frac{1}{5 x} \] (Click here for help with interval notation.) a. $ (f+g)(x)=\frac{25 x^{3}+50 x^{2}+1}{5 x} $ Domain of $ f+g $ : b. \( (f-g)(x)=\frac{25 x^{3}+50 2 answers