What is the domain of f(x)=(x+9)/(x-9) ?

The domain of f(x)=(x+9)/(x-9) is x 9

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domain of f(x)=(x+9)/(x-9)

domain

f (x) = \frac{x + 9}{x - 9}

x < 9 or x > 9

Interval Notation

(- \infty, 9) \cup (9, \infty)

Solution steps

Find undefined (singularity) points:

x = 9

The function domain

x < 9 or x > 9

\frac{x ^{3} + 4 x ^{2}}{5 x ^{2} - 3}

+ \frac{3 x ^{2} + 5 x - 12}{x ^{3} - 3 x ^{2}}

\frac{7 x + 13}{x ^{2} + 10 x + 24}

f (x) = \frac{- 8}{x - 9}

f (x) = 25 - (x + 2)^{2}

What is the domain of f(x)=(x+9)/(x-9) ?
The domain of f(x)=(x+9)/(x-9) is x<9\lor x>9