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School Survival Forums / Learning, Youth Rights and School Survival / School Talk v / Division by zero, absolute value and 'undefined number'.

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Division by zero, absolute value and 'undefined number'.
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LOON_ATTIC Offline
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Post: #31
Re: Division by zero, absolute value and 'undefined number'.

NO U

..dividing by anything... What about dividing by zero = dividing by infinite pieces?
Wait. 2/2=1, 2/1=2, 2/0 should be bigger? ur mom lolol
2/-1=-2. Gets smaller...
Since you're dividing it into infinite pieces, couldn't we say that they're all equal to zero? asdASg, I think that isn't mathematically useful. Think about what will be more useful...
Why else would you need a theory? What could you use it for?
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03-29-2010 06:31 PM
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Prince Rilian Offline
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Post: #32
Re: Division by zero, absolute value and 'undefined number'.

Here's a picture of 1/x.
http://library.thinkquest.org/2647/media/odd1ox.gif
Also, look at the long post I made, wherein I explained why x/0 is undefined.
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03-30-2010 01:02 AM
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LOON_ATTIC Offline
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Post: #33
Re: Division by zero, absolute value and 'undefined number'.

Hmm...
http://khanexercises.appspot.com/video?v=YRw8udexH4o
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03-30-2010 01:49 PM
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Prince Rilian Offline
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Post: #34
Re: Division by zero, absolute value and 'undefined number'.

Lunatic Wrote:Hmm...
http://khanexercises.appspot.com/video?v=YRw8udexH4o
Uh... yeah.
What about it?
Life is good. Jeta është e mirë. Goingcrazy
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03-31-2010 12:23 PM
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CameoDaManeo Offline
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Post: #35
RE: Division by zero, absolute value and 'undefined number'.

The reason why 1/0 is undefined is because 0 is neither positive, nor negative. It's inbetween.

You can fit an infinite number of zeros in 1, yes.

BUT

You can also fit a negative infinity of zeros in 1.

You can't divide by zero, not because the answer is infinity, but because the answer is simultaneously negative and positive infinity.

That's the simplest way that I can explain it anyway. I hope that this helps.
07-18-2016 01:01 PM
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the Analogist Offline
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Post: #36
RE: Division by zero, absolute value and 'undefined number'.

If you want to know the difference between two numbers you subtract one from the other. If your answer is negative then just remove the negative, thats the absolute value.

When I am lazy, using a calculator, and arrive at a step of subtraction, rather than retype the numbers so the answer is positive, i just do the subtraction and tell myself the answer is positive. It produces the same result and I can still be lazy.

Absolute value is useful as an idea. If perhaps we were filling out your tax forms (which you either do yourself or pay someone else (who will do it wrong)) there would be plenty of chances to practically apply the aboslute value concept. That you are unaware of such use could be taken as a sign that school is not making you aware of things you should know. Very few people actually need professionals to do their taxes, but since we're never taught a group of people get to make money off our ignorance. Thats actually an important clue as to why school teaches what it does.
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(This post was last modified: 07-21-2016 03:53 AM by the Analogist.)
07-21-2016 03:53 AM
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