What is the domain of f(x)= 3/(x-9) ?

The domain of f(x)= 3/(x-9) is x 9

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domain of f(x)= 3/(x-9)

domain

f (x) = \frac{3}{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

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

f (x) = 2 x^{2} - 8 x + 5

f (x) = x^{2} - 5 x + 6

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

y = \frac{x}{x - 1}

What is the domain of f(x)= 3/(x-9) ?
The domain of f(x)= 3/(x-9) is x<9\lor x>9