What is the domain of (2x)/(x^2+1) ?

The domain of (2x)/(x^2+1) is -infinity <x<infinity

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domain of (2x)/(x^2+1)

domain

\frac{2 x}{x ^{2} + 1}

- \infty < x < \infty

Interval Notation

(- \infty, \infty)

Solution steps

The function has no undefined points nor domain constraints. Therefore, the domain is

- \infty < x < \infty

f (x) = \frac{x ^{3}}{81 - x ^{2}}

1 + x^{2}

(2, - 3), (4, 5)

f (x) = cos (x) sin (x)

f (x) = x^{3} - 6 x^{2} + 9 x

What is the domain of (2x)/(x^2+1) ?
The domain of (2x)/(x^2+1) is -infinity <x<infinity