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

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

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domain of f(x)=(1-x)/(1+x)

domain

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

x < - 1 or x > - 1

Interval Notation

(- \infty, - 1) \cup (- 1, \infty)

Solution steps

Find undefined (singularity) points:

x = - 1

The function domain

x < - 1 or x > - 1

x^{2} - 10 x + 27

x^{2} - 10 x + 25

f (x) = 2 π x^{2} + 16 π x

f (x) = \frac{x - 3}{x ^{2} - 81}

2 ln (3 - 2 x) - 5

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