What is the domain of (21)/((x+4)x) ?

The domain of (21)/((x+4)x) is x 0

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domain of (21)/((x+4)x)

domain

\frac{21}{( x + 4 ) x}

x < - 4 or - 4 < x < 0 or x > 0

Interval Notation

(- \infty, - 4) \cup (- 4, 0) \cup (0, \infty)

Solution steps

Find undefined (singularity) points:

x = - 4, x = 0

The function domain

x < - 4 or - 4 < x < 0 or x > 0

f (x) = 2 e^{- x^{2} - x^{2}} + 2 cos (x) + 3

\frac{w ^{2} + w - 12}{w ^{2} - 81}

\frac{1}{x + 3 + 2}

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

\frac{2 x}{10 x + 1}

What is the domain of (21)/((x+4)x) ?
The domain of (21)/((x+4)x) is x<-4\lor-4<x<0\lor x>0