Recent content by Jonnyquest

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