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Home Q & A Board Science-Related Homework Help Mathematics
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fodog414 fodog414
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9 years ago
i've been working on this problem the past few days without any breakthrough, could anyone break it through for me Slight Smile


Inverse Functions vs. Reciprocals
Let  f(x) = 4 +  ( 2  x + 7   ) ^3 .

Find  f^{-1}(x) =

Find ( f(x)^{-1} =
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wrote...
#1
Educator
9 years ago
Quote from: fodog414 (9 years ago)
Let  f(x) = 4 +  ( 2  x + 7   ) ^3 .

Find  f^{-1}(x) =

Hello fodog414!

I plugged this into an inverse function calculator, and I found this (see attachment).

My only issue is distinguishing between Find  f^{-1}(x) and Find f(x)^{-1} Confounded Face
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fodog414 Author
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#2
9 years ago Edited: 9 years ago, fodog414
I got that exact calculation but I have no idea on how to plug in a root 3 in the program Frowning Face
Post Merge: 9 years ago

f-1(x) means the inverse of the function f.  (f(x))-1 has the same meaning as 5^-1 or a^-1 does, except your base is a function, not a number or variable.
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#3
Educator
9 years ago
Oh... okay, I will do this by hand tomorrow. I'm going to bed now, let me know when it's due.
Answer accepted by topic starter
bio_manbio_man
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#4
Educator
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9 years ago
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fodog414 Author
wrote...
#5
9 years ago
Thank you bioman i'm still trying to figure out how to plug it in but I'm 95% sure you are correct

 easily 10 folds a better teacher then my professor Slight Smile
wrote...
#6
Educator
9 years ago
Quote from: fodog414 (9 years ago)
easily 10 folds a better teacher then my professor

Thanks bro! (guessing you're a guy haha)

Good luck
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