Posted by **Jon** on Wednesday, May 25, 2011 at 12:51pm.

If f(a)=K, then which of the following must be true?

f(K)=a

f inverse(k)=a

f inverse(a)=K

- Algebra -
**MathMate**, Thursday, May 26, 2011 at 9:46am
Properties of inverses:

If f(a)=K

then

1. f^{-1}(K)=a

2. f^{-1}(f(a))=a

... etc

None of the above answers is correct unless the second one says

f inverse(**K**)=a (i.e. uppercase K)

- Algebra -
**Anonymous**, Wednesday, December 2, 2015 at 6:03pm
If ƒ(x ) = 2x, then ƒ -1(x ) =

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