What is the domain of a function like $f (x) = 5 x^{2}$ $f(x) = 5x^2$ ?

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What is the domain of a function like $f (x) = 5 x^{2}$ $f(x) = 5x^2$ ?

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Answer 1 · 2015-04-04T04:09:53

The domain is all real numbers. $D : {x : (x = R)}$ $D:{x:(x=R)}$
Domain is the set of all possible $x$ $x$ values for a function. The function $y = 5 x^{2}$ $y=5x^2$ is a parabola graphed below:
graph{5x^2 [-10, 10, -5, 5]}

The function stretches infinitely in both x-directions and is uninterrupted. The y-values (range) are restricted to all numbers greater than zero.

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What is the domain of a function like $f (x) = 5 x^{2}$ $f(x) = 5x^2$ ?

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