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marcelie

  • one year ago

Help Please !!!! For the following exercises, find the f^-1(x) for each function. f(x)= x/x+2 I solved it like this : Am i correct? y= x /x+2 x=y/y+2 (y+2) (x) = y xy+2x= y - xy -xy 2x=y-xy 2x/1-x= y(1-x)/1-x Final answer : 2x/1-x= y But my solotuion book says the answer is -2x/1-x= y Is the answer 2x/1*x

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  1. chosenmatt
    • one year ago
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    O.O

  2. chosenmatt
    • one year ago
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    ]yeah think your correct unless dan says otherwise ^.^

  3. dan815
    • one year ago
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    |dw:1441345659958:dw|

  4. chosenmatt
    • one year ago
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    kk you wasn't ;-;

  5. dan815
    • one year ago
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    |dw:1441345744813:dw|

  6. dan815
    • one year ago
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    |dw:1441345788256:dw|

  7. marcelie
    • one year ago
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    is that the final answer?

  8. dan815
    • one year ago
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    what you did to get to this point is also right -2x/(1-x)= y

  9. dan815
    • one year ago
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    however there is somethig wrong with your very last statement

  10. dan815
    • one year ago
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    wait sorry i mean what u did upto here is right u already solve it 2x/1-x= y(1-x)/1-x

  11. marcelie
    • one year ago
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    Let me solve it and please tell me wheres the mistake.

  12. dan815
    • one year ago
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    i dont know why u added a - sign on 2x after that step

  13. dan815
    • one year ago
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    http://prntscr.com/8cehp0

  14. dan815
    • one year ago
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    u did nothing wrong, the book is wrong

  15. marcelie
    • one year ago
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    |dw:1441346529360:dw|

  16. marcelie
    • one year ago
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    |dw:1441346653007:dw|

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spraguer (Moderator)
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