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

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

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domain of 2/(r^2+1)

domain

\frac{2}{r ^{2} + 1}

- \infty < r < \infty

Interval Notation

(- \infty, \infty)

Solution steps

The function has no undefined points nor domain constraints. Therefore, the domain is

- \infty < r < \infty

f (x) = 4 x^{2} + 7

f (x) = - 3 (x + 7) - 7

4 x^{3} - 12 x^{2}

y = - 2 - x + 1

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

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