Domain and Range 

I have gone through sooo many videos to try to get a good explanation of this... well done

thank you...

bro, you are doing awesome, but to mention that sqrt(of a number) is not positive number but it is always plus or minus of the result, hence the Range is real number (hence it is spans from 0 to all positive real numbers and all positive negative real numbers

this is very helpful. should ve done a different example

where is the sound?