Discussion

Here you can get some pice of information about the function: The intervall is displayed as well as the first and second differentiation. Also the points where the function is zero, has a min or max or a turning point. For some functions, the differentiation is not correct for all values. Table [*] shows the differentiations that are used. During a discussion, you can stop it with a mouse–click. You are asked whether to continue or stop. You can do this for every one of the three parts of a discussion.


Table: The differentiations
1. + - */ The usual
2. xa a*x(a-1)
3. ax ax*lna
4. f (x)g(x) (g(x)*ln(f (x)))'*f (x)g(x)
5. trigonometr. Functions The usual
6. abs(x) sgn(x) (For x=0 not correct)
7. int(x) 0 (Well ...)
8. sgn(x) 0 (Well ...)

THE AUTHOR UNDERTAKES NO LIABILITY FOR THE CORRECTNESS OF THE DIFFERENTIATION !!