What is the domain of f(x)= 7/x*9/(x+9) ?

The domain of f(x)= 7/x*9/(x+9) is x 0

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domain of f(x)= 7/x*9/(x+9)

domain

f (x) = \frac{7}{x} \cdot \frac{9}{x + 9}

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

Interval Notation

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

Solution steps

Find undefined (singularity) points:

x = 0, x = - 9

The function domain

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

x^{3} + 37 x + 250, 1 \leq x \leq 10

- 4 x^{2} + 6 x - 1

x e^{\frac{- x ^{2}}{2}}

f (x) = \frac{3 x + 5}{x - 4}

(2, - 3), (10, 7)

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