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anonymous

  • one year ago

If f(x) = 1/9x - 2 , what is f–1(x)?

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  1. Nnesha
    • one year ago
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    is it \[\huge\rm \frac{ 1 }{ 9x-2 } ~~~or~~\frac{ 1 }{ 9x}-2\]

  2. Nnesha
    • one year ago
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    ??

  3. anonymous
    • one year ago
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    1/9x + 2 is one of the answer

  4. Nnesha
    • one year ago
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    no i'm asking which one is your question first one or 2nd ?is it \[\huge\rm \frac{ 1 }{ 9x-2 } ~~~or~~\frac{ 1 }{ 9x}-2\]

  5. anonymous
    • one year ago
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    Oh, the second one.

  6. Nnesha
    • one year ago
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    alright so to find inverse switch `y` and `x` variable f(x) is same as y so \[\huge\rm \color{reD}{y}=\frac{ 1 }{ 9\color{blue}{x} }-2\] inverse would be \[\huge\rm\color{blue}{x}=\frac{ 1}{ 9\color{ReD}{y}}-2\] now solve for y

  7. Nnesha
    • one year ago
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    do you know how to solve that equation for y?

  8. anonymous
    • one year ago
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    y = 1/9(x+ 2) ?|dw:1441813061513:dw|

  9. anonymous
    • one year ago
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    Is that right ?

  10. Nnesha
    • one year ago
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    can you plz explain how u got that answer ?:=)

  11. anonymous
    • one year ago
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    I kept y on one side and moved everything else to x

  12. Nnesha
    • one year ago
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    haha, nice good!!

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