What is the domain of f(x)=(4x^2)/(x^2+1) ?

The domain of f(x)=(4x^2)/(x^2+1) is -infinity <x<infinity

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domain of f(x)=(4x^2)/(x^2+1)

domain

f (x) = \frac{4 x ^{2}}{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{x ^{2} - 19 x - 20}{x + 5}

\frac{2 m + 4}{8 m + m ^{2}}

\frac{x ^{2} - 4}{x - 3}

f (x) = \frac{( 1 - x )}{x}

\frac{6 x}{( x - 5 ) ( x - 9 )}

What is the domain of f(x)=(4x^2)/(x^2+1) ?
The domain of f(x)=(4x^2)/(x^2+1) is -infinity <x<infinity