this excerpt shows that you Rock cosmoS, and John is his own worst trolL
> And the same division by zero that you complained about above. Using > > limits avoids the actual division by zero, but you don't use limits, so > > it is a real problem for you. > > > > > Morover, any valid (m,n) pair > > > > How do you determine a valid pair? > > > > > will still work in the New Calculus gradient, that is, f'(x) = 2x + n > > > - m, which gives the general derivative if m=n=0, and also the numeric > > > derivative when x=c. > > > > What c? There was no mention of a c there.