Thanks a lot for the reply.
You that I am wrong because I was the one saying that the functions should also have the same formula.
In order to get things straight: You mean that the above two functions are equal... or not?
Hello to every one!
I have a question that came up when I was talking with a fellow mathematician.
I used to say that two functions are equal when the have the same formula and the same domain and codomain.
We read in a book though that two functions are equal when they have the same domain...
A friend of mine asked me to help him with this exercise. He has to deliver it tomorrow:
Homework Statement
A small child with mass equal to m is on a swing with length l and has the ability to change the length of the swing l. In the beginning he starts from the point 0 (see in the...