What is the domain of f(x)=log_{2}(-x) ?

The domain of f(x)=log_{2}(-x) is x<0

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domain of f(x)=log_{2}(-x)

domain

f (x) = lo g_{2} (- x)

x < 0

Interval Notation

(- \infty, 0)

Solution steps

Find positive values for logs:

x < 0

The function domain

x < 0

f (x) = x^{2} + y^{2} = 81

f (x) = x^{2} + y^{2} = 64

f (x) = \frac{2}{( x - 8 ) ( x + 7 )}

f (x) = [- 2.2]

f (x) = \frac{x - 9}{x + 8}