Not too sure where to start with this, any help would be great. I have calculated the partial derivitives wrt x and y, but think I am missing the formula where I have to sub in. Thanks
Follow Math Help Forum on Facebook and Google+
Use "implicit differentiation". If f(x, y)= C (a constant) then . That is, .
Last edited by HallsofIvy; Apr 11th 2013 at 06:41 PM.
thanks
Last edited by ducked; Apr 12th 2013 at 11:17 PM.
View Tag Cloud