How do you solve and write the following in interval notation: #x ≥ -1#?

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Answer 1 · 2016-06-28T14:00:06

#[-1, oo)#

Brackets mean that the value is included. For example:

#[ 5,#

From this I can already tell #5# is a solution, because of the bracket.

Parentheses indicate that the value is not included. For example:

#, 4) #

From this we can identify that #4# is not a solution, but all values go up to that number, not including it.

Whenever infinity, or #oo#, is used, the symbol must always be parentheses.