perplexus.info :: Calculus : Look Ma, no integrals!

Look Ma, no integrals! (Posted on 2006-05-02)

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?

See The Solution Submitted by Federico Kereki

Rating: 3.7500 (4 votes)

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
serious problem with solution	Bon	2006-07-23 16:10:44
Worked it out	e.g.	2006-05-04 09:33:36
A few more solutions	owl	2006-05-03 11:38:22
re(3): My (cryptic, mysterious, sibylline) Way	owl	2006-05-03 08:52:39
Combined Approach	Richard	2006-05-02 20:01:41
re(3): My (cryptic, mysterious, sibylline) Way	Richard	2006-05-02 17:16:01
re(2): My (cryptic, mysterious, sibylline) Way	Old Original Oskar!	2006-05-02 16:16:55
re: My (cryptic, mysterious, sibylline) Way	Richard	2006-05-02 16:06:36
My (cryptic, mysterious, sibylline) Way	Old Original Oskar!	2006-05-02 16:03:14
re: Stupidity Tries	Richard	2006-05-02 15:57:50
re(2): Observations and maybe solution	Richard	2006-05-02 15:52:45
Stupidity Tries	tomarken	2006-05-02 15:45:43
re: Observations and maybe solution	Federico Kereki	2006-05-02 15:41:30
Observations and maybe solution	Richard	2006-05-02 14:08:20

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