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[NF] Any NFs Talented at Math?

how are you at math?


  • Total voters
    86

ygolo

My termites win
Joined
Aug 6, 2007
Messages
5,981
yep, i read it now, it's true.
that prove was 2003 in National competition in math here in Croatia for 1st year High School. i did it the same as you did until
1 b*p[(a2 -bc) + (b2-ac) + (c2-ab)] >= 0
then i've put
2 (a-b)*2= a2-2ab+b2 >= 0
3 (b-c)*2= b2-2bc+c2 >= 0
4 (c-b)*2= c2-2bc+b2 >= 0
since 2+3+4
is (2a2-2bc)+(2b2-2ac)+(2c2-2ab)>=0 which makes 1 true, after you divide it with 2 etc.

i like it because you dont have to have any real knowledge to do it, besides basic calculus. inequalities were always most interesting thing in math to me.

Your way is simpler. I just typed out what popped into my head. Thought I think you made a typo on the fourth line.

Shouldn't it be 4 (c-a)^2= c^2-2ac+a^2 >= 0 ?
 

Chloe

New member
Joined
May 1, 2009
Messages
2,196
Your way is simpler. I just typed out what popped into my head. Thought I think you made a typo on the fourth line.

Shouldn't it be 4 (c-a)^2= c^2-2ac+a^2 >= 0 ?

yep, typo :)
 

LostInNerSpace

New member
Joined
Jan 25, 2008
Messages
1,027
MBTI Type
INTP
yep, i read it now, it's true.
that prove was 2003 in National competition in math here in Croatia for 1st year High School. i did it the same as you did until

What does that say? It says if you want to be good a doing proofs, do a lot of proofs. Personally I'd rather stick a pencil where it does not belong. That's why I'm more drawn towards the mathematical physics way of doing math. Mathematical physicists are not so anal about rigorous proof. Not that I've done a whole lot of it yet. My scouting reveal mathematical physics as an area I might want to focus on. There are plenty of other people to worry about the proofs.
 
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