What is the domain of (2x)/2 ?

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

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domain of (2x)/2

domain

\frac{2 x}{2}

- \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

r an g e f (x) = 5 x^{2} + 4 x - 9

in v erse \frac{2}{x ^{2} + 1}

d o main x^{2} - 2 x - 2

e x t re m e f (x) = (x - 3)^{\frac{2}{3}}

d o main f (x) = \frac{( 3 x + 8 )}{x ^{2} - 81}