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Katieann16

  • 3 years ago

Help Meeee ):

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  1. Katieann16
    • 3 years ago
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    if f(x)= 3/x & g(x)=3x which is true? A) (fog)(2)=2 B) (gof)(0)=0 C) (fog)(9)=1 D) (gof)(-9)=-1

  2. Katieann16
    • 3 years ago
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    @zordoloom

  3. jim_thompson5910
    • 3 years ago
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    first can you tell me what g(2) is?

  4. Katieann16
    • 3 years ago
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    no

  5. jim_thompson5910
    • 3 years ago
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    g(x) = 3x g(2) = 3*2 ... replace EVERY x with 2 g(2) = 6

  6. jim_thompson5910
    • 3 years ago
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    (f o g)(2) = f(g(2)) (f o g)(2) = f(6) (f o g)(2) = ???

  7. jim_thompson5910
    • 3 years ago
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    so how do you find f(6)?

  8. Katieann16
    • 3 years ago
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    f=3?

  9. jim_thompson5910
    • 3 years ago
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    f(x)= 3/x f(6)= 3/6 f(6) = ???

  10. Katieann16
    • 3 years ago
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    ?

  11. jim_thompson5910
    • 3 years ago
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    reduce 3/6

  12. jim_thompson5910
    • 3 years ago
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    what do you get?

  13. Katieann16
    • 3 years ago
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    1/2

  14. jim_thompson5910
    • 3 years ago
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    so is (fog)(2)=2 true?

  15. Katieann16
    • 3 years ago
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    yes

  16. jim_thompson5910
    • 3 years ago
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    but we just found that f(6) = 1/2 which pointed to the fact that (f o g)(2) = 1/2

  17. Katieann16
    • 3 years ago
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    but that isnt a choice on the answers?

  18. jim_thompson5910
    • 3 years ago
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    so that rules out choice A

  19. Katieann16
    • 3 years ago
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    so its B?

  20. jim_thompson5910
    • 3 years ago
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    what is f(0)

  21. jim_thompson5910
    • 3 years ago
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    f(x) = 3/x f(0) = 3/0 is that possible?

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