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anonymous

  • one year ago

Help If f(x)=-3x+3, then f^-1(x)=

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  1. welshfella
    • one year ago
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    first find x in terms of f(x) can you do that?

  2. anonymous
    • one year ago
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    no

  3. welshfella
    • one year ago
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    ok its like solving for x f(x) = -3x + 3 add 3x to both sides f(x) + 3x = -3x + 3x + 3 the tems in x disappear on right side 3x + f(x) = 3 now subtract f(x) from both sides 3x = 3 - f(x) finally divide both sides by 3:- x = (3 - f(x)) / 3 replace f(x) by x and we have the inverse of f(x) f-1 (x) = (3 - x)/3

  4. welshfella
    • one year ago
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    that is it

  5. anonymous
    • one year ago
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    so solve for the bottom one or is that the answer

  6. welshfella
    • one year ago
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    That is the answer

  7. welshfella
    • one year ago
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    f^-1 (x) is the inverse of f(x)

  8. anonymous
    • one year ago
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    Thank you

  9. welshfella
    • one year ago
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    yw

  10. anonymous
    • one year ago
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    but how would you do this one If f(x)=3x-7, then f^-1(x)=

  11. welshfella
    • one year ago
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    in a similar way to the first

  12. anonymous
    • one year ago
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    i tried but i don't get it

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spraguer (Moderator)
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