Search found 4 matches

by Jeffrey
Thu Jul 19, 2007 6:35 pm UTC
Forum: Mathematics
Topic: Favourite Erroneous "Proofs"
Replies: 194
Views: 43455

Ahh, thank you very much, stupid constants of integration. And the answer I was really looking for was that when expressed as x + x + x + ... x times, the expression "x times" has no meaning when you aren't talking about integers, and derivatives only have any meaning in the realm of conti...
by Jeffrey
Thu Jul 19, 2007 2:09 pm UTC
Forum: Mathematics
Topic: Favourite Erroneous "Proofs"
Replies: 194
Views: 43455

Re: Favourite Erroneous "Proofs"

Here is my favourite "proof" that 0 = 1: We evaluate the integral of 1/x dx by parts; so u = 1/x; du = -1/x^2 dx; dv = dx; and v = x. so we have: /int 1/x dx = x*1/x - /int (-1/x^2)*x dx /int 1/x dx = 1 + /int 1/x dx so we can subtract the integral of 1/x dx from both sides...and voila: 0...
by Jeffrey
Tue Jul 17, 2007 1:28 pm UTC
Forum: Mathematics
Topic: Favorite math jokes
Replies: 1452
Views: 489340

Oh I forgot my favorite: A mathematician organizes a lottery in which the prize is an infinite amount of money. When the winning ticket is drawn, and the jubilant winner comes to claim his prize, the mathematician explains the mode of payment: "1 dollar now, 1/2 dollar next week, 1/3 dollar the...
by Jeffrey
Mon Jul 16, 2007 7:02 pm UTC
Forum: Mathematics
Topic: Favorite math jokes
Replies: 1452
Views: 489340

Re: Favorite math jokes

John and Michael are in a floating balloon above a canyon. John turns to Michael and says "I think we're lost", so Michael leans over the canyon and shouts "CAN ANYONE HELP US? WE DON'T KNOW WHERE WE ARE!" His shout echoes in the canyon and a few minutes later they hear "YO...

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