What is the domain of f(x)= 1/(x-81) ?

The domain of f(x)= 1/(x-81) is x 81

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domain of f(x)= 1/(x-81)

domain

f (x) = \frac{1}{x - 81}

x < 81 or x > 81

Interval Notation

(- \infty, 81) \cup (81, \infty)

Solution steps

Find undefined (singularity) points:

x = 81

The function domain

x < 81 or x > 81

f (x) = 2 x^{3} - 6 x^{2} + 4

f (x) = 4 x^{2} - 12 x + 8

2 t

f (x) = \frac{1}{3 x + 2}

f (x) = \frac{1}{2} (- 4 x + 20)^{2} - 3

What is the domain of f(x)= 1/(x-81) ?
The domain of f(x)= 1/(x-81) is x<81\lor x>81