college help: REALLY NEED HELP WITH THIS MATH PROBLEM ASAP - Help.com

REALLY NEED HELP WITH THIS MATH PROBLEM ASAP

find f inverse, f inverse(7) and (f inverse of f)(-7)

f=(3,5),(-7,7)(-5,9)

ANSWER IN AN ORDERED PAIR…

*pretend when i say f inverse that it looks like f with a raised -1 next to it.

This open post was written 1 month, 1 week ago | V/U/S: 116, 2, 2 | Edit Post | Leave a reply | Report Post


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fractal.scatter offline Verified User (10 months, 1 week) Long Term User Shouts: 346 #
An Unknown Location | 1 month, 1 week ago (7 hours, 1 minute after post)

You have written that f describes some elements of a set; not a continuous set or a function; so there is no function which can be inverted to map the range back to the domain.

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david__sim offline Unverified User #
An Unknown Location | 1 month, 1 week ago (19 hours, 4 minutes after post)

If you mean that f={(3,5), (-7,7), (-5,9)} then all this means is that f(3)=5, f(-7)=7 and f(-5)=9 and f is not defined on any other values. ie. the domain of f is {3, -7, -5} and the range (and in this case codomain) of f is {5, 7, 9}.

So to find f inverse just reverse the ordered pairs (f inverse maps the range of f onto the codomain in such a way that f inverse of f is the identity map) and the rest should be obvious from this.

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