What is the domain of f(x)=(x+9)/(x^2-18x+81) ?

The domain of f(x)=(x+9)/(x^2-18x+81) is x 9

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domain of f(x)=(x+9)/(x^2-18x+81)

domain

f (x) = \frac{x + 9}{x ^{2} - 18 x + 81}

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

f (x) = 3 x^{4} - 12 x^{2} + 9

(8, - 6), (7, - 8)

(- 2.5) (10)

What is the domain of f(x)=(x+9)/(x^2-18x+81) ?
The domain of f(x)=(x+9)/(x^2-18x+81) is x<9\lor x>9