Asked by Rachale
                Write the interval notation corresponding to the set notation 
{x | x < –7}.
            
        {x | x < –7}.
Answers
                    Answered by
            MathMate
            
    Since 
[-5,8) is the same as {x|-5=<x<8}
we have
{x|x<-7}
in interval notation
[-infinity, -7)
    
[-5,8) is the same as {x|-5=<x<8}
we have
{x|x<-7}
in interval notation
[-infinity, -7)
                    Answered by
            Jen
            
    Thank you, but why is it 
(-infinity -7)?
is it translated to
negative infinity - 7?
    
(-infinity -7)?
is it translated to
negative infinity - 7?
                    Answered by
            MathMate
            
    You are right in actual practice, it is normal to exclude infinity or negative infinity.  In my books, -infinity is a short form for negative infinity.
So the correct answer would be:
<b>(negative infinity, -7)</b>
    
So the correct answer would be:
<b>(negative infinity, -7)</b>
                    Answered by
            Charlie
            
     Write the interval notation corresponding to the set notation {x | - 5 < x  4}.
    
                                                    There are no AI answers yet. The ability to request AI answers is coming soon!
                                            
                Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.