What is the domain of f(x)= 3/(x^2-2x-15) ?

The domain of f(x)= 3/(x^2-2x-15) is x 5

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domain of f(x)= 3/(x^2-2x-15)

domain

f (x) = \frac{3}{x ^{2} - 2 x - 15}

x < - 3 or - 3 < x < 5 or x > 5

Interval Notation

(- \infty, - 3) \cup (- 3, 5) \cup (5, \infty)

Solution steps

Find undefined (singularity) points:

x = 5, x = - 3

The function domain

x < - 3 or - 3 < x < 5 or x > 5

\frac{1}{x}

f (x) = x^{2} + 12 x - 36

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

f (x) = 2 x^{2} + 12 x - 13

f (x) = - x^{2} - 4 x + 1

What is the domain of f(x)= 3/(x^2-2x-15) ?
The domain of f(x)= 3/(x^2-2x-15) is x<-3\lor-3<x<5\lor x>5