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Rachelxox

  • 3 years ago

What is the inverse of the function f(x)=1/3x-2 a f-1(x)=3x-6 B f-1(x)=3x+6 C f-1(x)=-3x+6 D f-1(x)=-3x-6

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  1. Yahoo!
    • 3 years ago
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    Put y = f(x) y = 1/3x-2 Solve for x

  2. Rachelxox
    • 3 years ago
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    How do I do that

  3. BluFoot
    • 3 years ago
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    Isolate x on one side of the equation

  4. Rachelxox
    • 3 years ago
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    Can u solve it for me please

  5. Loujoelou
    • 3 years ago
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    Hey to find the inverse of functions you got to do 4 steps. 1. Substitute f(x) with y. 2. Reverse the x and y variables. 3. Solve for y. 4. Replace y with f^-1x

  6. Rachelxox
    • 3 years ago
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    Ok

  7. Loujoelou
    • 3 years ago
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    Can you do the first step?

  8. Rachelxox
    • 3 years ago
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    Y=1/3x-3

  9. Loujoelou
    • 3 years ago
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    Everything's good but you accidentally wrote the last number wrong :) it's 2 :). Now can you do the 2nd step? ;)

  10. Rachelxox
    • 3 years ago
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    So i add 2 to the other side

  11. Loujoelou
    • 3 years ago
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    That's a bit later, but don't forget the 2nd step says to Reverse the x and y variables. Since our function is now y=1/3x-2, we'd switch the x & y over, and it'd now be x=1/3y-2 :) Do you get it so far? :)

  12. Loujoelou
    • 3 years ago
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    and yeah on the 3rd step you'd then add 2 to both sides, & multiply by 3 to both sides as you're solving for y.

  13. Rachelxox
    • 3 years ago
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    Yeah . do now lol I forgot about that part tthat's whats been screwing my up

  14. Loujoelou
    • 3 years ago
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    If you forget, just use this problem to help you and eventually you'll be fine :) Did you get the answer? :)

  15. Rachelxox
    • 3 years ago
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    No I'm confused again likeep how can u divided 1/3

  16. Rachelxox
    • 3 years ago
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    *like

  17. Loujoelou
    • 3 years ago
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    oh okay :) well we got x+2=1/3y To eliminate the 1/3, if we multiply it by it's reciprocal (opposite) which is 3, the 1/3 & 3 will cancel out leaving the y by itself :) and then we'd multiply 3 to the other side as well :) did you get that? :)

  18. Loujoelou
    • 3 years ago
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    you multiply instead to cancel out the fraction by it's opposite number :)

  19. Rachelxox
    • 3 years ago
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    Ohh pellet . Feel stupid now ugh

  20. Rachelxox
    • 3 years ago
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    pellet

  21. Rachelxox
    • 3 years ago
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    dam

  22. Loujoelou
    • 3 years ago
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    its okay :) everyone makes mistakes so it's a good thing you know how to :) I myself just learned this 2 days ago :p I made mistakes at first but I got it afterward :)

  23. Rachelxox
    • 3 years ago
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    Okeyyy thanks sooo much

  24. Loujoelou
    • 3 years ago
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    no prob. :) hey by some chance do you take algebra 2 on flvs? o.O

  25. Rachelxox
    • 3 years ago
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    No im tmaking it i. School some of it is eeasy but some of it is just plan out hard why

  26. Loujoelou
    • 3 years ago
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    oh okay, no prob. :) I take Alg. 2 on flvs so was just wondering bc just learned this as well :) well best of luck but i g2g now so bye :)

  27. Rachelxox
    • 3 years ago
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    OK bye

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