What is the domain of x+9 ?

The domain of x+9 is -infinity <x<infinity

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domain of x+9

domain

x + 9

- \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

x^{2} - 4 x + 2

\frac{1 - 7 x}{8}

\frac{8 x}{x ^{2} + 1}

f (x) = \frac{2 x + 1}{x ^{2} + 2 x - 3}

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