The professor wrote the differential equation f²/f'=1 on the blackboard, and asked the students to solve it.

Everybody started working with the usual methods, except for a kid at the back of the class, who happened to have skipped that material, but was very bright.

Can you solve this equation without any integration?

(In reply to Stupidity Tries by tomarken)

This was advertised as a calculus problem, not a trick problem.  Certainly f=1 does not solve the calculus problem.  The answer to the question posed must really be "no."  However, you have clearly exposed FK's nefarious intent to subvert mathematics!

Posted by Richard on 2006-05-02 15:57:50