Are the following interval notations correct?
1. x is in R, x not equal 1 ----> R\{1}
2. x<1 or x>3 ----> R\[1,3]
3. x=1, x>3 ----> {1}U(3, infinity)
Thanks!!!
I disagree too. Download this video:
YouTube - College Algebra - Lecture 1 - Numbers
Where Dr. Delaware discusses interval notation somewhere in the middle of the lesson.