If f(x) = 2x and g(x)=1/x, what is the domain of (f*g)(x)?
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Ans is R-{0} as f(0)=2×0.
g(0) =1/0 which is not defined
so f.g is also not defined
g(0) =1/0 which is not defined
so f.g is also not defined
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