## View Poll Results: how are you at math?

Voters
88. You may not vote on this poll
• I am NFP: talented

14 15.91%
• I am NFP: above average

14 15.91%
• I am NFP: average

7 7.95%
• I am NFP: below average

2 2.27%
• I am NFP: I suck at math

12 13.64%
• I am NFJ: talented

10 11.36%
• I am NFJ: above average

15 17.05%
• I am NFJ: average

9 10.23%
• I am NFJ: below average

3 3.41%
• I am NFJ: I suck at math!

2 2.27%

# Thread: Any NFs Talented at Math?

1. Originally Posted by Chloee
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 ?

2. Originally Posted by ygolo
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

3. Originally Posted by Chloee
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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