What is the domain of f(x)=(x+7)/(x^2-49) ?

The domain of f(x)=(x+7)/(x^2-49) is x 7

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domain of f(x)=(x+7)/(x^2-49)

domain

f (x) = \frac{x + 7}{x ^{2} - 49}

x < - 7 or - 7 < x < 7 or x > 7

Interval Notation

(- \infty, - 7) \cup (- 7, 7) \cup (7, \infty)

Solution steps

Find undefined (singularity) points:

x = 7, x = - 7

The function domain

x < - 7 or - 7 < x < 7 or x > 7

2 cos (3 x)

f (x) = x^{4} - 5

x = - 8

x^{3} + 8

f (x) = \frac{1}{6} x^{4} - 31 x^{2}

What is the domain of f(x)=(x+7)/(x^2-49) ?
The domain of f(x)=(x+7)/(x^2-49) is x<-7\lor-7<x<7\lor x>7