That is in the textbook.
But as an extra assignment he challenged us to look for the classic proof.
Said it was messy and took a good page to write up. It is most likely found in old calculus books. Thats all I've got.
thanks for the reply though,
Hi, would you know the name of the classic proof that doesn't use induction?
I have been looking for it but don't know how it was done.
In my first calculus class at the moment and we have been asked to locate it.
thanks.