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Inverse Functions (LAST PROBLEM, PLEASE HELP)

  1. Aug 29, 2010 #1
    Last edited: Aug 29, 2010
  2. jcsd
  3. Aug 29, 2010 #2

    jgens

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    The hollow circle denots the composition of functions, not the product. Second, you should be more precise with your notation. For example, I'm unsure whether f(x) = x/5 - 3 or f(x) = (5x)-1 - 3.
     
  4. Aug 29, 2010 #3
    I linked to the exact picture of the problems. anyone who can solve this is greatly appreciated
     
  5. Aug 29, 2010 #4

    jgens

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    Okay, so f(x) = x/5 -3. Now, do you know how to find the composition of two functions? For example, if I told you to find f(g(x)), could you do it?
     
  6. Aug 29, 2010 #5
    yea it would be 1/5(x^2) - 3. right? What next??
     
  7. Aug 29, 2010 #6

    jgens

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    Okay, so you just need to find g-1(f-1(-3)). Pretty simply.
     
  8. Aug 29, 2010 #7
    so i got 5 (-3+3) aka 5(0)=0

    so inverse g (0)=root 0??

    is that my answer?
     
  9. Aug 29, 2010 #8
    yep! the program took the answer correctly! thanks so much
     
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