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

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

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domain of f(x)=(1+2x)/(x^2+1)

domain

f (x) = \frac{1 + 2 x}{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) = x^{2} + 2 x - 1, x > 0

g (x) = 4 x - 6

f (x) = 2.5 x + 85

y = \frac{( x ^{2} - 2 x )}{( x ^{2} - 4 )}

x^{3} - 2 x^{2} + 2

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