What is the domain of (8-x)/(7x+21) ?

The domain of (8-x)/(7x+21) is x -3

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domain of (8-x)/(7x+21)

domain

\frac{8 - x}{7 x + 21}

x < - 3 or x > - 3

Interval Notation

(- \infty, - 3) \cup (- 3, \infty)

Solution steps

Find undefined (singularity) points:

x = - 3

The function domain

x < - 3 or x > - 3

f (x) = \frac{x ^{2}}{5}

f (x) = 13 x

f (x) = x - [x]

lo g_{10} (x - 5) + 3

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

What is the domain of (8-x)/(7x+21) ?
The domain of (8-x)/(7x+21) is x<-3\lor x>-3