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Adi3

  • one year ago

please help will medal For each of the following functions: (i) find f^-1 (x) and the funtions are f(x) = (3 - 2x)/4

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  1. Adi3
    • one year ago
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    We need to inverse \[\frac{ 3-2x }{ 4}\]

  2. Adi3
    • one year ago
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    but I don't know how to fo it.

  3. Adi3
    • one year ago
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    @phi

  4. rishavraj
    • one year ago
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    follow the steps :) http://www.coolmath.com/algebra/16-inverse-functions/05-how-to-find-the-inverse-of-a-function-01

  5. Adi3
    • one year ago
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    I don't get that

  6. rishavraj
    • one year ago
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    replace f(x) with "y" so its y = (3 - 2x)/4

  7. rishavraj
    • one year ago
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    and then switch x and y .... so u will get x = (3 - 2y)/4 and then solve for y

  8. Adi3
    • one year ago
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    so for solving for y we do |dw:1442232845898:dw|

  9. Adi3
    • one year ago
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    so is it gonna be 3/4+ 2

  10. Adi3
    • one year ago
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    when we solve for Y

  11. rishavraj
    • one year ago
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    hmmm see. x = (3 - 2y)/4 multiply 4 onn both sides.... u will get 4x = 3 - 2y so 3 - 4x = 2y now get y

  12. Adi3
    • one year ago
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    how do u get y?

  13. Adi3
    • one year ago
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    is it |dw:1442233372467:dw|

  14. rishavraj
    • one year ago
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    nah see i askd u to switch x and y so u will get \[x = \frac{ 3 - 2y }{ 4 }\]

  15. rishavraj
    • one year ago
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    so multiply 4 on both side . u will get 4x = 3 - 2y

  16. Adi3
    • one year ago
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    is back to the same thing

  17. rishavraj
    • one year ago
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    then 3 - 4x = 2y so y = (3 - 4x)/2

  18. Adi3
    • one year ago
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    alright i get bye

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