1) f(x) = 2x - 1
D∈ (-∞;+∞)
2) f(x) = x+1/2
3) f(x) = 2/x+1
D∈ R\{-1}
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1) f(x) = 2x - 1
D∈ (-∞;+∞)
2) f(x) = x+1/2
D∈ (-∞;+∞)
3) f(x) = 2/x+1
D∈ R\{-1}