Specificity in math matters !

Functions and their Inverses 

A common mistake made by math teachers and students alike:

All relations have inverses but not all inverses are functions.  Please don’t say that the inverse does not exist because it

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We overheard a teacher telling a student to use the inverse when the teacher really meant find the reciprocal.

These terms are NOT interchangeable.

Here is an example:            take the function      f(x) = x2

The inverse is      f-1

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