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| Math | |
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| Tweet Topic Started: Aug 30 2009, 06:25 PM (1,054 Views) | |
| chagi | Aug 30 2009, 06:25 PM Post #1 |
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Metroid
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Every forum should have a math topic! Post mathemetical problems or such here! |
| doobie doo | |
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| Timmeh | Aug 31 2009, 07:11 AM Post #2 |
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The Electryc Penys
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Prove: There are an infinite number of prime numbers n such that n+2 is also a prime. 3 is one such prime, since 3+2 = 5, a prime number. 5 is one such prime, since 5+2 = 7, a prime number. 7 is not such a prime, because 7+2 = 9, a composite number. GO |
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| chagi | Sep 3 2009, 04:50 PM Post #3 |
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Metroid
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well screw you that was too hard :/ I can proove that there's an infinte amount of primes though. :/ |
| doobie doo | |
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| Syntax Man | Sep 4 2009, 01:54 AM Post #4 |
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Omega Pirate
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Tim, you don't need to prove that there's an infinite number of primes because there are infinite numbers, as a result there will be infinite primes. |
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| Timmeh | Sep 4 2009, 02:02 AM Post #5 |
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The Electryc Penys
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Syntax, that wasn't what I was asking, but your proof is stupid. That doesn't follow logically at all. Here are the proofs for that though: http://en.wikipedia.org/wiki/Euclid%27s_theorem chagi, I tricked you. That's an unsolved problem in mathematics No one on Earth knows the answer.
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| chagi | Sep 4 2009, 02:27 PM Post #6 |
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Metroid
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Well that was mean.
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| doobie doo | |
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| DeProgrammer | Sep 4 2009, 04:20 PM Post #7 |
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Elite Pirate
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I've learned some fun, applicable stuff in the last day! But it's a Calculus 2 class, so very few people would understand it. ![]() ...including this stuff (the latter half or so) and how to calculate the centroid of a region of uniform density and how to use that to calculate the volume of a solid of revolution of that region. (So basically, I can now calculate how much pressure the water in my swimming pool exerts on the pool itself, assuming all the walls are perfectly vertical and flat, and I can calculate the volume of something perfectly radially symmetrical, like a AA battery or the top portion of a water bottle! Woo hoo!) Not that these are realistic scenarios at all. Calculus is dumb when it comes to this sort of thing...you could get a better estimation of the volume of any object by submersing it in a liquid than by trying to figure out the equation that makes up its edges.
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| chagi | Sep 4 2009, 08:20 PM Post #8 |
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Metroid
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link wont work
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| doobie doo | |
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| DeProgrammer | Sep 4 2009, 08:51 PM Post #9 |
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Elite Pirate
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Works fine for me. It's for calculating the total force of a liquid on a vertical plate that is submersed in said liquid. |
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| Timmeh | Sep 4 2009, 10:21 PM Post #10 |
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The Electryc Penys
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Shitty link, use http://www.shmsoft.com/yosef/Calculus%20Te...lasSV_06_06.pdf instead. |
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| Liksmaskaren | Sep 5 2009, 01:29 AM Post #11 |
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The Swede
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There was one man but the north Koreans thought he was a dog ate him. |
| Pixel and 3D artist | |
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| chagi | Sep 5 2009, 08:04 PM Post #12 |
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Metroid
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woah physics yeah i'm only good at pura math i would be good at physics if i was taught physics but i am not taught physics and so, i'm not good at physics |
| doobie doo | |
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| chagi | Sep 11 2009, 07:09 AM Post #13 |
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Metroid
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k create an expression for the n:th number in the following sequence: 1 1 2 4 8 16 32 64 ... |
| doobie doo | |
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| MrGuest | Sep 11 2009, 12:41 PM Post #14 |
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Guestinator the Guestinator
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All of the numbers added together make the next number. |
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| DeProgrammer | Sep 11 2009, 01:09 PM Post #15 |
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Elite Pirate
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Uh... it's 2^x. (x >= 0, x % 1 = 0) Try something more interesting, like 0, 0.693, 1.099, 1.386, 1.609... |
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No one on Earth knows the answer.


12:16 AM Jul 11