What is the domain of (2-x)/(x+1) ?

The domain of (2-x)/(x+1) is x -1

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domain of (2-x)/(x+1)

domain

\frac{2 - x}{x + 1}

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

f (x) = \frac{1}{x - 5}

f (x) = x^{4} - 2 x^{2} - 4

f (t) = t + 7

\frac{1}{x ^{2} - 4}

(x^{3} - x - 18)^{4}