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Inequalities [just a quick one (:] - May 25th 2009, 04:52 PM

Right, you know on inequality diagrams? you get an arrow with a circle on the end and sometimes the circle is coloured and sometimes it is hollow? can anyone remember which one means bigger then or equal to and which one just means bigger than?
i dont know if that makes sense :S
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Re: Inequalities [just a quick one (:] - May 25th 2009, 05:30 PM

If the circle is filled in it means equal to.
   
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Re: Inequalities [just a quick one (:] - May 25th 2009, 05:36 PM

Like, okay, if you have:



<------------.
<--1--2--3--4--5--6--7--8--9--10--11--12-->

Since the dot is filled in, it means that you include three, so it reads
"x is less than or equal to three"

Or:



<-----------o
<--1--2--3--4--5--6--7--8--9--10--11--12-->


Since the dot isn't filled in, it means you start at, but don't include three.
It reads: "x is less than three"



Hope that makes sense and helps? :P

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Re: Inequalities [just a quick one (:] - May 25th 2009, 09:14 PM

To put it another (wordier) way:
The filled circle means "less/greater than OR equal to"
The empty circle means "less/greater than BUT NOT equal to"


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Re: Inequalities [just a quick one (:] - May 26th 2009, 05:14 PM

Thanks Everyone



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Re: Inequalities [just a quick one (:] - May 26th 2009, 05:17 PM

Quote:
Originally Posted by N@0M! View Post
Thanks Everyone
I'm glad you got the answers you were looking for.

I'm going to go ahead and close this, since the question has been answered multiple times. :]

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