Asked by lauren
My teacher said to always use a parentheses when using the infinity symbol with interval notation. Could you explain why?
Example: x ≥ -1
Interval notation would be [ -1, ∞ ) with a parentheses at the end instead of the square bracket. Please explain why. Thank you.
Example: x ≥ -1
Interval notation would be [ -1, ∞ ) with a parentheses at the end instead of the square bracket. Please explain why. Thank you.
Answers
Answered by
ThisGirlCJ
I hope this helps! :)
Use parentheses to represent infinity or negative infinity, since positive and negative infinity are not numbers in the usual sense of the word and, therefore, cannot be “equaled.” A few examples of an interval, or a set of numbers in which a solution falls, are [−2,6) , or all numbers between −2 and 6 , including −2.
you should imagine a number the tinniest bit greater than 5, and that is where the group of numbers begins. The parenthesis to the left of 5 is called a round bracket or an exclusive bracket.
Use parentheses to represent infinity or negative infinity, since positive and negative infinity are not numbers in the usual sense of the word and, therefore, cannot be “equaled.” A few examples of an interval, or a set of numbers in which a solution falls, are [−2,6) , or all numbers between −2 and 6 , including −2.
you should imagine a number the tinniest bit greater than 5, and that is where the group of numbers begins. The parenthesis to the left of 5 is called a round bracket or an exclusive bracket.
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