(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I don't remember the exact question right now, but it was something like this:

f(x) = sqrt(4 - x^2)

I needed to give the domain / range of it, and also symmetry I believe.

2. Relevant equations

3. The attempt at a solution

I know this is a half circle after being graphed, but how can I show the domain and range in a math way?

For domain, I know 4 - x^ must >= 0, so I can solve for it that way.

But what about range?

Can I also just isolate x and then get sqrt with y inside and restrict to real numbers?

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# Homework Help: Domain / range of this function

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