anonymous
  • anonymous
I NEED HELP!!!! Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x. f(x) = quantity x minus nine divided by quantity x plus five. and g(x) = quantity negative seven x minus eight divided by quantity x minus one.
Mathematics
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
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anonymous
  • anonymous
Sorry people, I just really need help!!
anonymous
  • anonymous
Could you possibly take a picture of the equation?

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More answers

anonymous
  • anonymous
No it was written out..
myininaya
  • myininaya
\[f(x)=\frac{x-9}{x+5} , g(x)=\frac{-7x-8}{x-1}\] is this what you mean?
myininaya
  • myininaya
don't think you are going to be able to confirm what you want to with that f and g
Vocaloid
  • Vocaloid
actually, it's possible, it just requires a lot of algebraic simplification to find f(g(x)), take the expression for g(x) and substitute it in for x in f(x), and after simplifying you should get x do the same thing for g(f(x))
Vocaloid
  • Vocaloid
please tag me if you need to see the numbers worked out
myininaya
  • myininaya
Yes I know it is possible to find f(g(x)) and g(f(x)) but the person will not be able to confirm what they wanted @Vocaloid
myininaya
  • myininaya
I think there was a type-o since the question says confirm which means they are indeed inverses but these are not inverses.
Vocaloid
  • Vocaloid
@myininaya Oh, I see, well in that case, I stand corrected.
myininaya
  • myininaya
But the person can reach this conclusion by doing that whole plugin in thing and clearing the compound fractions as you mentioned

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