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!!!
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Originally Posted by acc100jt 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!!! you are correct
Originally Posted by acc100jt 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 on (1) and (2). Those are not "interval notation". The first should be written as and the second as
Originally Posted by HallsofIvy I disagree on (1) and (2). Those are not "interval notation". The first should be written as and the second as 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.
I did not pay attention to the thread subject it is about intervals, sorry
ok. Thanks a lot. Anyway, am I allowed to remove an interval from real numbers, like R\[1,3], is this notation ok? and can i union a set and an interval, like ?
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