Lend a hand please? Quick Help..

Question

3mar · Answer

Hint: can you determine the domain and range of the main function?

xetsdoittt · Answer

cold you walk me through it, as in show the steps on how u got your solution?

xetsdoittt · Answer

could*

3mar · Answer

of course
let's start with the domain of the main function

xetsdoittt · Answer

ok, continue..

3mar · Answer

What is the forbidden values for $$f(x)=\sqrt{x-4}$$ to except it from the domain?

3mar · Answer

Is it possible to find a negative number under the square root?

3mar · Answer

Are you there?

xetsdoittt · Answer

sorry, but no its not possible

3mar · Answer

Good!
So what is the domain?

3mar · Answer

seems you busy, and me too, so please don't let me wait a lot.

xetsdoittt · Answer

would it be C?

3mar · Answer

Did not you ask for "steps"?
now you need direct answer or check!

xetsdoittt · Answer

yes but now my laptop is dying and I can't find the charger!! So checking it is FINE

3mar · Answer

Ok

3mar · Answer

The clue is:
find the domain and the range of the main function, then swap them for the inverse (if the inverse is a function).

xetsdoittt · Answer

attachment

xetsdoittt · Answer

laptop dying sir..

3mar · Answer

main function:
domain: [4, infinity[
range:    [o, infinity[

inverse function (if it is);
domain: [o, infinity[
range:    [4, infinity[

3mar · Answer

You said: C, where are the choices?

3mar · Answer

Rest in peace!