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

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

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.

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

Hi ArunSH

Welcome to the forum!

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

?? I said Thanks and that stuff.

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

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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