What is the domain of f(x)=sqrt(20-x) ?

The domain of f(x)=sqrt(20-x) is x<= 20

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domain of f(x)=sqrt(20-x)

domain

f (x) = 20 - x

x \leq 20

Interval Notation

(- \infty, 20]

Solution steps

Find non-negative values for radicals:

x \leq 20

The function domain

x \leq 20

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

y = \frac{1}{2} x - 4, (9, - 6)

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

4 y - 16 x = 8

f (x) = \frac{1}{x - 6}