Thanks Delta and Fredrik ...
I made a small mistake , when i did the indetermination 0/0. But when i saw the solution posted by Delta , i saw the error.
Thanks to you all.
OK, I've just spoke with my teacher.
Now I've to proof that a function x^2 + y^2 is equal to 2x in order to x and by the definition ( limit ).
How do i do it ??
Thanks
Best Regards
It was my Math teacher who challenged me to proof that the definition is right.
But i don't how to doi it.
I already proof the simple derivative definition.
Thanks
Hello, I'm trying to proof the partial derivative definition , how do i proof it ??
@f/ @x = lim h-->0 lim [f(a +h, b) - f(a, b)] / h
If possible , i'd like to seen all the calculations
Best regards