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anonymous

  • one year ago

If f is a function such that f(2)=4, which of the following could be f^-1, the inverse function of f?

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  1. ganeshie8
    • one year ago
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    `which of the following...` where are they ?

  2. anonymous
    • one year ago
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    (a) = (sqrtx) +2 (b) x^2 (c) (1/2)x (d)2^x

  3. ganeshie8
    • one year ago
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    f(2) = 4 when u feed in 2, it is spitting out 4 so the inverse function must do the exact opposite : when u feed in 4, it must spit out 2

  4. ganeshie8
    • one year ago
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    plugin x=4 in each of the options and see which one evaluates to 2

  5. anonymous
    • one year ago
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    c?

  6. ganeshie8
    • one year ago
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    Yep!

  7. anonymous
    • one year ago
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    So for these types of questions, all we have to do is just plug them in?

  8. ganeshie8
    • one year ago
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    that will do, i don't see any other way

  9. anonymous
    • one year ago
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    Great, thank you!

  10. ganeshie8
    • one year ago
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    yw! just remember that if (a, b) is a point on f(x), then (b, a) will be a point on its inverse function.

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