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

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

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

domain

\frac{2 x ^{2} - x - 1}{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{1}{x ^{2} - 6 x - 7}

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

\frac{x ^{2} - 11 x + 18}{x ^{2} + 2 x - 8}

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

f (x) = \frac{5 x}{x ^{2} + 81}

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