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#1 2013-10-08 05:54:02

ArunSH
Member
Registered: 2013-10-08
Posts: 2

Hello everyone!

Hey everyone! My friend shivam got me on this forum. is this the place for intros? Well, i am in high school (12th grade) and I need a lot of help so ill be on here often! Nice to meet you all. And can anyone help me with this?

(1/3≤xy+yz+zx≤ 3) find the range of values for xyz and range of values for x+y+z

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#2 2013-10-08 06:07:18

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,636

Re: Hello everyone!

Hi ArunSH;

Welcome to the forum.

That is a BMO question. The solution is given here with the method. Please take a look at it.

http://www.computing-wisdom.com/problem … 93-1-5.pdf


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#3 2013-10-08 06:12:46

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: Hello everyone!

Hi ArunSH

Welcome to the forum! smile


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#4 2013-10-08 06:15:09

ArunSH
Member
Registered: 2013-10-08
Posts: 2

Re: Hello everyone!

?? I said Thanks and that stuff.

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#5 2013-10-08 06:21:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,636

Re: Hello everyone!

Hi;

You are welcome.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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