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Topic:
Fly problem, alternative solution?
Replies:
6
Last Post:
Oct 15, 2003 4:05 PM




Re: Fly problem, alternative solution?
Posted:
Feb 8, 1997 2:29 PM


> > If you notice the whole thing lasts 2 hours, you see at once the > answer is 150 miles. > But you might instead work out that the first leg of the fly's > trip lasts 1.6 hours and is 120 miles long; the second leg is 1/5 as > long, 24 miles; the third, likewise, is 4.8 miles; and so on. You sum > the infinite series (a geometric one)... and get 150 miles, the hard way.
Yes, it is rather simple:
s1*SUM(C^n,n=1,oo) where C = V1/V2 (If you have one train as a refernece point)
> > The story goes, someone gave this to von Neumann and the latter gave > the answer in a few seconds. >  "Ah, of course you saw the quick method... You know, some people > try to sum the infinite series..." >  "What do you mean?... I _did_ sum the infinite series..." > >
I've heard that one before.
//Luka   mailto:devalmont@geocities.com http://www.geocities.com/CapeCanaveral/1630/ 



