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anonymous

  • 5 years ago

I got help for this problem before, but just checked and it's not correct. What am I doing wrong with this problem? f(x)=3sqrt(5-x)+3 y=3sqrt(5-x)+3 3sqrt(5-x)=y-3 (3sqrt(5-x)^3=(y-3)^3 5-x=(y-3)^3 x=-(y-3)^3-5

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  1. anonymous
    • 5 years ago
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    y = 3rt(5-x) + 3 ; i assume you wanna invert it x = (5-y)^(1/3) + 3 x-3 = (5-y)^(1/3) (x-3)^3 = 5-y (x-3)^3 -5 = -y -(x-3)^3 +5 = y

  2. anonymous
    • 5 years ago
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    last step

  3. anonymous
    • 5 years ago
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    This is the help I got, but it's still not correct.

  4. anonymous
    • 5 years ago
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    y = 3rt(5-x) + 3 ; x = (5-y)^(1/3) + 3 These two are not same! even not inverses of each other!

  5. anonymous
    • 5 years ago
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    I was confused with that. that's what the other tutor person on here sent me.

  6. amistre64
    • 5 years ago
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    tutor? :)

  7. anonymous
    • 5 years ago
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    question answerer?

  8. amistre64
    • 5 years ago
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    free helper that is prone to error ;)

  9. anonymous
    • 5 years ago
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    I tried to send you a message but you werent on anymore

  10. anonymous
    • 5 years ago
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    You're fine to be wrong, I just want to know what I'm doing.

  11. anonymous
    • 5 years ago
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    Inverse of f(x)=3rt(5-x)+3 is g(x)=5-(x-3)^3

  12. anonymous
    • 5 years ago
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    sorry if you felt I was blaiming

  13. amistre64
    • 5 years ago
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    no feelings hurt :)

  14. anonymous
    • 5 years ago
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    I put that and it told me that there was a syntax error

  15. amistre64
    • 5 years ago
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    y = cbrt(5-x) + 3 ; we can usually find the inverse by swapping x and y ; and resolving for y. x = cbrt(5-y) +3 x-3 = cbrt(5-y) ; ^3 each side... (x-3)^3 = 5-y ; +y and -(x-3)^3 to both sides y = 5 -(x-3)^3 which is exaclty the same as: y = -(x-3)^3 + 5 which sauhkik says aint the solution lol

  16. amistre64
    • 5 years ago
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    cbrt(5-y) = (5-y)^(1/3) they are the exact same thing..

  17. anonymous
    • 5 years ago
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    Ok, I tried it again and it was happy with it. I must have typed that one wrong or something.

  18. anonymous
    • 5 years ago
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    Yeah I know that's the same thing.

  19. amistre64
    • 5 years ago
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    :) im glad it worked for you :)

  20. anonymous
    • 5 years ago
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    :) this online hmwk may be the end of me..... :p

  21. amistre64
    • 5 years ago
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    programs can be sticklers for "do it exactly like i say" mentality lol

  22. anonymous
    • 5 years ago
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    It also gets unhappy when simplifying raticals... took me forever figure that one out.

  23. amistre64
    • 5 years ago
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    have you tried yelling at it? :)

  24. anonymous
    • 5 years ago
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    haha, yeah that has happend. the little thinking dudes in my computer dont seem to hear me....

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