For the interval notation, ( and ) correspond to excluding the lower and upper limits. While [ and ] imply the inclusion of the lower and upper limits.
The two limits are separated by a comma.
Thus
[-5,8) is the same as {x|-5=<x<8}
So the correct answer would be:
(negative infinity, -7)
See also
http://www.jiskha.com/display.cgi?id=1243999516
Write the interval notation corresponding to the set notation
{x | x < –7}
5 answers
Would this work as well to represent that answer? (-infintity symbol, -7)
Yes, definitely.
I would have put the infinity symbol if I could get it posted correctly.
Note also that negative infinity itself has been excluded from the interval because of the parenthesis instead of the square bracket.
I would have put the infinity symbol if I could get it posted correctly.
Note also that negative infinity itself has been excluded from the interval because of the parenthesis instead of the square bracket.
Thanks for you help!
Hope you got your answer AND understood well the interval notation.