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Re: Blog Thread IIIa : Look Who's Blogging Now
Spluff:
--- Quote from: snalin on 22 Aug 2010, 04:32 ---It's pretty simple, and I understand everything. The problem is figuring out how I can write the equations down, since there's no examples and no teachers. Which isn't much of a problem with easier problems, but for the harder ones you need to know how to write this stuff to figure out the solution. I can see that |x - 1| + |x + 1| = 2 gives that x equals (-1, 1), but I don't know how to get that down on paper.
Also what Spluff said. I think they said that we were going to use absolute values to learn about limits, but I'm not sure. Does that make any sense?
--- End quote ---
To get that down on paper you have to remember how to find the absolute value in the first place, which is √(x²) = |x|. Then you can just substitute it in, rearrange it, and then solve.
So you'd take
|x+1| + |x-1| = 2
√(x+1)² + √(x-1)² = 2
(x² + 2x + 1) + (x² - 2x + 1) = 4
x² = 1
x = ±1
Spluff:
what a nerd
McTaggart:
After the third step it's
2x² + 2 = 4
2x² = 2
x² = 1
|x| = 1
Wait now I've confused myself elsewhere.
Papersatan:
Hello Blog thread. I am in quarantine for a bird flu vaccine study. I have been here 6 days now and I have 6 more to go. We are confined to our small hospital rooms and the nurses that come to see us wear masks and visors and gloves. There are 20 people in this study and it is easy to tell which of us are introverts/are comfortable alone and which of us are not. I just started feeling a little lonely last night; I was missing Stephen specifically. Four of the people around me have clearly been going crazy for days. An hour after breakfast they are all standing in their doorways yelling down the hall at each other and they spend much of the afternoon playing spades online and also yelling down the hall at each other. The walls are very thin and even with my door closed it sounds like they are right outside my door. I definitely thought quarantine would be much quieter.
Liz:
In regards to the kitty: Brittany, if you find another one I think you can bring them to the veterinary students at NDSU as well. They'll get all of their shots, spays and neuters, and a bunch of other kitties to play with. I think my sister told me at one point that they can hang on to cats for a few months and try to find adoptive kitty parents, so the odds are better for a cute little guy like that. I'm not sure what their policy is on taking strays, but I know they've done it before so I think you can call and ask at least. They will make the kitty all better!
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