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Ways of writing inverse functions

say f(x)=2x+1 the inverse function f−1(x)=(x−1)/2f^-1 (x)=(x-1)/2 is there anything wrong with writing it like this f−1:−−>(x−1)/2f^-1 : --> (x-1)/2

I'm new to this so sorry if the latex stuff doesn't work properly, I'll edit it if it doesn't. :smile:
(edited 12 years ago)
To improve your LaTeX stick curly brackets around the -1.

{-1}

You need an x after the colon in the second version.
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tdx
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Original post by Mr M
To improve your LaTeX stick curly brackets around the -1.

{-1}

You need an x after the colon in the second version.


cheerss :smile: so f−1(x)=(x−1)/2f^{-1}(x)=(x-1)/2 and yeah, thanks for pointing that mistake out.. f−1:x−−>(x−1)/2f^{-1}:x-->(x-1)/2 is the second version still an acceptable way of writing an inverse function? I'm asking because I have not seen it anywhere! A question in my textbook has a function written using the arrow way and I wrote the answer (inverse function) in the same way (using the arrow, as in example two) but the answer for it in my book has switched to the f−1(x)f^{-1}(x) way.
(edited 12 years ago)
That's fine. You are often expected to state the domain of the inverse function as well.
Reply 4
Avatar for tdx
tdx
OP
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Original post by Mr M
That's fine. You are often expected to state the domain of the inverse function as well.


ok, thank you! :smile:

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