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

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

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

domain

f (x) = \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

\frac{sin ( x )}{1 + cos ( x )}

x^{4} - 8 x^{2} + 16

f (x) = \frac{2 x - 1}{4 + 5 x}

g (x) = 3 x + 2

f (x) = \frac{4 - x}{3 + x}

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