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#2 2012-08-03 03:07:00
- bobbym
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Re: Inequality having Absolute Value and Constant on its 2 side
Hi;
What does this mean:
x/+2
In mathematics, you don't understand things. You just get used to them.
Probability is the most important concept in modern science, especially as nobody has the slightest notion what it means.
90% of mathematicians do not understand 90% of currently published mathematics.
#4 2012-08-03 03:12:58
- anonimnystefy
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Re: Inequality having Absolute Value and Constant on its 2 side
Hi 296Ja
Is this what you want:
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#8 2012-08-03 03:32:06
- bob bundy
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Re: Inequality having Absolute Value and Constant on its 2 side
Ok. Split the problem into three parts.
part (i) suppose x>8
Then x-8 is positive and 8 - x is negative.
So you can replace the absolute values like this
3(x-8) + 2 < 7 - 2(x-8)
so
5(x-8) < 5
x-8 < 1
x < 9
So for part (i) 8 < x < 9
Bob
part two follows soon
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#9 2012-08-03 03:44:38
- bob bundy
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Re: Inequality having Absolute Value and Constant on its 2 side
part (ii)
Suppose x < 8
then x-8 is negative and 8 - x is positive.
So I can re-write without absolutes like this:
-3(x-8) + 2 < 7 + 2(x-8)
-5 < 5(x-8)
-1 < x - 8
7 < x
so for part (ii)
7 < x < 8
Finally for part (iii)
If x = 8
the inequality becomes
2 < 7 which is true so x = 8 is also a solution
Putting all together
7 < x < 9
Graph below
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#11 2012-08-03 03:58:25
- bob bundy
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Re: Inequality having Absolute Value and Constant on its 2 side
You're welcome.
The graph plotter is here if you need it:
http://www.mathsisfun.com/data/function … amp;ymax=8
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#15 2012-08-03 07:59:03
- anonimnystefy
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Re: Inequality having Absolute Value and Constant on its 2 side
Hi
My work here is negligible.
And, is your avatar a manga character?
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#17 2012-08-03 10:58:57
- anonimnystefy
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Re: Inequality having Absolute Value and Constant on its 2 side
Oh okay. Have you ever heard of manga?
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#19 2012-08-03 11:06:30
- anonimnystefy
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Re: Inequality having Absolute Value and Constant on its 2 side
Mangas are the comic books and animes are animated films. I like both. Have you read/warched any? I presume you watched Naruto?
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#21 2012-08-03 11:20:37
- anonimnystefy
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Re: Inequality having Absolute Value and Constant on its 2 side
Here, everybody reads manga or watches anime likes Naruto. There are some other ones I like. Death Note and Inuyasha (my avatar) for example.
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#22 2012-08-03 11:29:36
- 295Ja
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Re: Inequality having Absolute Value and Constant on its 2 side
Same here. I think I'm only one of the few teens who is not yet that hooked in mangas and animes.But last week, I watched Princess Mononoke and I liked it. I have a brother who really love anime. I have heard him telling how good Death Note is. He also liked Fairy Tail and Reborn.
Last edited by 295Ja (2012-12-03 23:34:32)
#23 2012-08-03 11:35:30
- anonimnystefy
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Re: Inequality having Absolute Value and Constant on its 2 side
I heard Princess Mononoke is good. I have a few manga waiting on my "to read" list (like Fullmetal Alchemist, Princess Mononoke, Hellsing,...), but I will start that when I finish Inuyasha. Death Note is much better as aa manga, but has boring parts.
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón
#24 2012-08-03 11:47:15
- 295Ja
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Re: Inequality having Absolute Value and Constant on its 2 side
Whooh! Seems like you're an avid reader of mangas.
I'll tell my brother about the Death note's manga.
I'm sorry cause I'm about to log-out now. Its because I'm going to prepare for my class later. It's been nice knowing more of you! 
Bye-bye for now and until next time!
Have a great day ahead! 
#25 2012-08-03 11:54:47
- anonimnystefy
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Re: Inequality having Absolute Value and Constant on its 2 side
Yeah, I think he might like it.
See you soon, I hope.
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón