Hi guys, I haven't posted in a while but I was tutoring someone and ran into a problem that I thought had got right but blackboard said was incorrect.
The problem is
Now find the second derivative when x = 2 and y =1
I keep getting 3/4 as my answer. I solved it using implicit differentiation and also using partials differentiation to double check. The correct answer according to blackboard is -14/27
and can someone show me what im doing wrong with my latex. Guess im a bit rusty. Thanks
A point against the quotient rule? Many people prefer to see the quotient as a product, anyway. Just in case a picture helps...
... where (key in spoiler) ...
Spoiler:
FR's method is another way of avoiding the quotient rule here. In balloon sculpture...
__________________________________________________ __________
Don't integrate - balloontegrate!
Balloon Calculus; standard integrals, derivatives and methods
Balloon Calculus Drawing with LaTeX and Asymptote!