F(x)=√(-18-3x)how do I find the domain of f(x)? ​

Question

`f(x)=√(-18-3x)`how do I find the domain of f(x)?


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Answer 1

Explanation:

The value inside the square root must be positive or

`-18 - 3x \geq 0 \Rightarrow -3x \geq 18`

or

`x \leq -6`

So the domain will be for x to be less than or equal to -6.