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## #1 2013-08-25 07:23:50

Al-Allo
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### Set question

If I had the following :

and I have put it in comprension notation :

{x∈R|12<equal x <equal15 and 15<equal x <equal 30 }

Is the comprehension notation good ?

*'and' means intersection in this case

## #2 2013-08-25 16:58:43

bob bundy
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### Re: Set question

Yes, that looks good to me.

Are you expected to simplify as well?

Bob

You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

## #3 2013-08-26 00:24:11

Al-Allo
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### Re: Set question

What do you mean ??? How can it be more simplified ?

## #4 2013-08-26 02:11:34

bob bundy
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### Re: Set question

If x must lie in the region  12 to 15 AND in the region 15 to 30, then x must be ????

Bob

You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

## #5 2013-08-26 02:41:05

Al-Allo
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### Re: Set question

Well the intersection is 15, if that's what you're asking