What is the domain of f(x)=((1+x^2))/(4-x^2) ?

The domain of f(x)=((1+x^2))/(4-x^2) is x 2

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domain of f(x)=((1+x^2))/(4-x^2)

domain

f (x) = \frac{( 1 + x ^{2} )}{4 - x ^{2}}

x < - 2 or - 2 < x < 2 or x > 2

Interval Notation

(- \infty, - 2) \cup (- 2, 2) \cup (2, \infty)

Solution steps

Find undefined (singularity) points:

x = 2, x = - 2

The function domain

x < - 2 or - 2 < x < 2 or x > 2

What is the domain of f(x)=((1+x^2))/(4-x^2) ?
The domain of f(x)=((1+x^2))/(4-x^2) is x<-2\lor-2<x<2\lor x>2