What is the domain of f(x)=(7-x)/(x^2-9x) ?

The domain of f(x)=(7-x)/(x^2-9x) is x 9

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domain of f(x)=(7-x)/(x^2-9x)

domain

f (x) = \frac{7 - x}{x ^{2} - 9 x}

x < 0 or 0 < x < 9 or x > 9

Interval Notation

(- \infty, 0) \cup (0, 9) \cup (9, \infty)

Solution steps

Find undefined (singularity) points:

x = 9, x = 0

The function domain

x < 0 or 0 < x < 9 or x > 9

y = cos (sin (cot (π x)))

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

f (x) = \frac{5 ^{x}}{8 + 5 ^{x}}

y - 10 = - 2 (x - 3)

- 36000 + 0.2 w

What is the domain of f(x)=(7-x)/(x^2-9x) ?
The domain of f(x)=(7-x)/(x^2-9x) is x<0\lor 0<x<9\lor x>9