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What is the domain of the function f(x) = 3x?
1. (-∞, ∞)
2. (0, ∞)
3. [0, ∞
4. (-∞, ∞) - {0}

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Correct Answer - Option 1 : (-∞, ∞)

Concept:

The domain is the set of all possible value of x which have a finite value of f(x).

Calculation:

Given function f(x) = 3x

The function will have a finite value for all x ∈ (-∞, ∞)

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