## Search found 8 matches

- Wed May 15, 2013 2:09 pm UTC
- Forum: Mathematics
- Topic: triples (x,y,z) with particular properties
- Replies:
**11** - Views:
**4610**

### Re: triples (x,y,z) with particular properties

If x ≠ y, we can do the following: x^4 = y + z y^4 = x + z Subtract the lower equation from the upper one to get x^4 - y^4 = y - x. x^4 - y^4 = y - x (x^2 + y^2)(x^2 - y^2) = y - x (x^2 + y^2)(x - y)(x + y) = -(x - y), divide by (x - y) to get (x^2 + y^2)(x + y) = -1 (x^2 + y^2) is positive for real...

- Tue Dec 25, 2012 4:58 pm UTC
- Forum: Science
- Topic: How can I tell if this is really magnesium citrate?
- Replies:
**7** - Views:
**3938**

### Re: How can I tell if this is really magnesium cirtate?

Keep in mind also, that any vitamin or such that you're buying to consume, probably isn't purely that substance, there's probably some chalky filler or binding agent or such to make up the bulk of it. Looking up that brand, it says it's 100% pure powder, but looking at the supplement facts, it says...

- Wed Feb 16, 2011 10:14 am UTC
- Forum: Food
- Topic: Beer is proof that God loves us and wants us to be happy.
- Replies:
**1738** - Views:
**364037**

### Re: Beer is proof that God loves us and wants us to be happy

http://www.cnbc.com/id/15840232/?video=3000005011&play=1 Some people in Finland just tasted a 170 year old beer. It was salvaged from a ship wreck, but still "tasted like beer". Well that's interesting; I suppose the question is did it taste more stale than lets say, a Stella? Being F...

### Re: Minecraft

Anyone want to put together a level 3+ Menger Sponge? I've been able to toss up a level 2 rather quickly. Inspired by this, I built a level 3 Menger sponge last night with a couple of other guys. It's very tedious to craft the 27x27x27 base sponge in the beginning - a level 1 sponge (which we start...

- Fri Apr 09, 2010 6:46 am UTC
- Forum: Mathematics
- Topic: Calculus Derivatives Question
- Replies:
**5** - Views:
**777**

### Re: Calculus Derivatives Question

You're right and your professor has made a mistake somewhere, I believe. I just went through it myself and also got 2(x-8)/(x+1)^4. WolframAlpha agrees.

- Tue Aug 18, 2009 5:28 pm UTC
- Forum: Logic Puzzles
- Topic: Another Minesweeper puzzle
- Replies:
**20** - Views:
**4606**

### Another Minesweeper puzzle

Is it possible to have a level of any size where every square is either a mine or the number 1? How about 2? Or any one from 1-8? The solution is, of course, trivial for numbers 5-8, as shown in the spoiler below, but it gets more difficult for the others. #'s are mines. Only 8's, grid size ...

- Tue Mar 31, 2009 2:36 pm UTC
- Forum: Mathematics
- Topic: An algebra question
- Replies:
**10** - Views:
**1519**

### Re: An algebra question

Starting here: t^2-4t-t+4 you could then rearrange the terms like this: t^2-t-4t+4 (t^2-t)-(4t-4) From there you can go to t(t-1)-4(t-1) (t-1)(t-4) Once you spend some time with quadratic equations, basic factorizations such as this one will become sec...

- Sun Mar 01, 2009 1:38 pm UTC
- Forum: Music
- Topic: Modern "Prog-Rock"?
- Replies:
**129** - Views:
**10884**

### Re: Modern "Prog-Rock"?

I'm a huge fan of Beardfish and strongly recommend them. Especially Sleeping in Traffic: Part Two is a stellar album, easily the best stuff I've heard in a long while. Part One is great too, but hasn't (yet?) hit me the same way as Part Two does. They are relatively new, having started in the early ...