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anonymous

  • one year ago

I'm confused on something can anyone help? for medal?

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  1. anonymous
    • one year ago
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    Which function below is the inverse of f(x) = The quantity of three x plus five, over seven.?

  2. anonymous
    • one year ago
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    f−1(x) = The quantity of seven x minus five, over three f−1(x) = The quantity of seven x plus five, over three −f−1(x) = Seven over the quantity of three x plus five f−1(x) = Seven over the quantity of five minus three x

  3. Mehek14
    • one year ago
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    \(\dfrac{3x+5}{7}\) ?

  4. anonymous
    • one year ago
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    yes :)

  5. anonymous
    • one year ago
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    @DJthereal here's something i need help on

  6. anonymous
    • one year ago
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    @LynFran

  7. anonymous
    • one year ago
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    option First. want solution?

  8. anonymous
    • one year ago
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    LOL, i'm lost? what do you mean whats the solution A. f−1(x) = The quantity of seven x minus five, over three B. f−1(x) = The quantity of seven x plus five, over three C. −f−1(x) = Seven over the quantity of three x plus five D .f−1(x) = Seven over the quantity of five minus three x

  9. anonymous
    • one year ago
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    A is correct! solution means how to get it!

  10. anonymous
    • one year ago
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    whats tha equation??

  11. anonymous
    • one year ago
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    nvm i see

  12. anonymous
    • one year ago
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    A sounds good. but y A?

  13. anonymous
    • one year ago
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    i think its B or A

  14. anonymous
    • one year ago
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    @DJthereal same but i think someone needs to show me how to find the answer. i have a test coming up soon. thats why i'd ask why it's A.

  15. anonymous
    • one year ago
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    1 sec...i had a problem similar to this but i can't find my old notebook

  16. anonymous
    • one year ago
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    \[f(x)=\frac{ 7x-5 }{ 3}\\ switch \ x\ and\ f(x)\\ x=\frac{ 7f(x)-5 }{ 3 }\\solving \ for\ f(x)\\f(x)=\frac{ 3x+5 }{ 7}\\putting\ f(x)= inverse\ f(x)\\ \therefore \ inverse\ f(x)= \frac{ 3x+5 }{ 7 }\]

  17. anonymous
    • one year ago
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    thats A??

  18. anonymous
    • one year ago
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    wait which one did @eninone jus solve??

  19. anonymous
    • one year ago
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    what are tha answer choices??

  20. anonymous
    • one year ago
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    oh! no ! a plus sign missed! hey! @nerlineg check out my solution, Option A is Correct.

  21. anonymous
    • one year ago
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    \[given\ f(x) = \frac{ 3x+5 }{ 7}\\ switch\ x\ and \ f(x)\\ i.e. x \ becomes\ f(x) \ and \ f(x) \ becomes\ x\\ x=\frac{ 3f(x)+5 }{ 7},\ solve\ for\ f(x)\\7x=3f(x)+5\\7x-5=3f(x)\\f(x)=\frac{ 7x-5 }{ 3 }\\replace\ f(x) \ by\ inverse\ f(x)\\i.e.,\ inverse\ f(x)=\frac{ 7x-5 }{ 3 }\\clearly\ option\ A \ is\ Correct!\]

  22. ybarrap
    • one year ago
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    Yes, @eninone has the correct solution.

  23. anonymous
    • one year ago
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    yeah, my teacher did a typo, but yup you are right thanks ! i actually do understand it now. with everyone's help on here ! @eninone @ DJthereal

  24. anonymous
    • one year ago
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    @DJthereal

  25. anonymous
    • one year ago
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    You should read 'How to Sove it' by George Polya. https://en.wikipedia.org/wiki/George_P%C3%B3lya http://www-history.mcs.st-andrews.ac.uk/Biographies/Polya.html

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