Thread: Range notation

Here is what my book says:

If the range of a function is (–5, 5), this means that –5 is included in the range, but 5 is not. (The range is said to be “inclusive” of –5 but exclusive of 5.)

Is this true? I've never heard of this before.

Originally Posted by benny92000

Here is what my book says:

If the range of a function is (–5, 5), this means that –5 is included in the range, but 5 is not. (The range is said to be “inclusive” of –5 but exclusive of 5.)

Is this true? I've never heard of this before.

Absolutely not.

Square brackets [] are inclusive, round brackets () are exclusive.

So if -5 is included and 5 is excluded, then the range is [-5, 5).

Too many typos in this book. Actually, it's not a book, it's a SparkNotes online test for Math level 2 SAT. But thank you.