Can anyone answer this?
|Help us uncover the truth about exam cheats – is cheating ever ok? What if you wouldn't get caught?||27-06-2016|
Well, as you suggested, it's not very clear what f is supposed to be. My best guess would be that f is supposed to be z (because it was defined as a function of x and y) and that they're asking for implicit differentiation. You could also isolate z and then use a quotient rule, which would get you to the same place.
For example, if you take the partial in x you get
If you want to get rid of the z, you can write
and then substitute back in to get
RegisterThanks for posting! You just need to create an account in order to submit the post Already a member? Sign in
Oops, something wasn't right
please check the following: