This week in PreCalc we finished up our first unit (Series and Sequences) and just started our new unit on Absolute Values. We went over infinite geometric series, but we also learned about the Absolute Value of a Real Number, which I find very interesting.

 

Something new I learned that I did not know before is the fact that if a number is a negative but you need to find the absolute value of it, it becomes a positive and that is represented by the two lined surrounding the number: |-2| so in this case, even though the number is represented by a negative, it turns into |2| because that is the absolute value of it.

 

Here is an example:

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