Posted by scooby9132002 on Friday, June 26, 2009 at 5:15pm.
It is supposed to mean between -4 and 10, but I never remember if the end points are included in this notation.
I never used that notation, I use something like
-4 ≤ x ≤ 10 or -4 < x < 10
So it means that you are only concerned about the graph that falls within those two values of x .
Clarify from your text or your instructor whether the endpoints are included or exclude.
[-4,10] means -4<=x<=10
The square brackets mean that the limites are included in the interval.
If a limit is to be excluded, use the parentheis or turn the brackets backwards.
(-4,10] means -4 < x <=10.
]-4,10] also means -4 < x <=10
See:
http://en.wikipedia.org/wiki/Interval_(mathematics)
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