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GiggleSquid

  • 2 years ago

If f(x)=4x+7 and g(x)= sqrt(x-3), what is (fog)(4)

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  1. GiggleSquid
    • 2 years ago
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    keep getting these square root ones wrong. medal to correct answer

  2. lgbasallote
    • 2 years ago
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    lol bribing?

  3. GiggleSquid
    • 2 years ago
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    well, just want people to double check there answer

  4. lgbasallote
    • 2 years ago
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    well what's your answer

  5. GiggleSquid
    • 2 years ago
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    lemme do it

  6. lgbasallote
    • 2 years ago
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    tag me when you have an answer

  7. GiggleSquid
    • 2 years ago
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    \[\sqrt{23-3}\] 4.4721 but thats not right.

  8. GiggleSquid
    • 2 years ago
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    @lgbasallote

  9. lgbasallote
    • 2 years ago
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    solve for g(4) first

  10. lgbasallote
    • 2 years ago
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    \[(f o g)(4) \implies f(g(4))\]

  11. GiggleSquid
    • 2 years ago
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    ahhh, so 11

  12. lgbasallote
    • 2 years ago
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    yup

  13. GiggleSquid
    • 2 years ago
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    here is one that introduces h @lgbasallote Let f(x)=(4x^3+20)^2 and g(x)=4x^3+20. Given that f(x)=(hog)x, find h(x)

  14. GiggleSquid
    • 2 years ago
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    where do i start with that

  15. lgbasallote
    • 2 years ago
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    find (h o g) x first

  16. vishweshshrimali5
    • 2 years ago
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    sorry to interrupt but Prefer this link .. for understanding ; http://www.regentsprep.org/Regents/math/algtrig/ATP7/compositionfunctions.htm

  17. vishweshshrimali5
    • 2 years ago
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    see the examples. . you may continue @lgbasallote

  18. GiggleSquid
    • 2 years ago
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    this may help, in helping me

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  19. GiggleSquid
    • 2 years ago
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    wait, how do i find (hog)?

  20. lgbasallote
    • 2 years ago
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    find g(x) first

  21. lgbasallote
    • 2 years ago
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    what is g(x)

  22. GiggleSquid
    • 2 years ago
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    what do i use for x?

  23. lgbasallote
    • 2 years ago
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    x

  24. GiggleSquid
    • 2 years ago
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    isnt it just 4x^3+20 then?

  25. lgbasallote
    • 2 years ago
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    yup

  26. lgbasallote
    • 2 years ago
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    so therefore h(4x^3 + 20) = f(x) do you agree with this?

  27. GiggleSquid
    • 2 years ago
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    yes

  28. GiggleSquid
    • 2 years ago
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    where do i use that?

  29. lgbasallote
    • 2 years ago
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    hmm this was easier in my head...

  30. GiggleSquid
    • 2 years ago
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    lol

  31. lgbasallote
    • 2 years ago
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    how will you turn h(4x^3 + 20) into h(x) what do you think?

  32. GiggleSquid
    • 2 years ago
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    geeze, I have no clue.

  33. lgbasallote
    • 2 years ago
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    me neither :/

  34. lgbasallote
    • 2 years ago
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    try posting it as a new question maybe someone has an idea

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