What is the domain of 3x+12 ?

The domain of 3x+12 is -infinity <x<infinity

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domain of 3x+12

domain

3 x + 12

- \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

3 x + 10

f (x) = \frac{3 x + 5}{x ^{2} + 3 x - 28}

f (x) = x^{2} + 7

\frac{x + 2}{5}

\frac{1}{x - 2}