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Math Help - Which of these functions have inverse(s) and why?

  1. #1
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    Which of these functions have inverse(s) and why?

    a) f(x) = 10^x


    b) f(x) = x^2 - 10


    c)
    _x_|_f(x)_
    ..-3|-1
    ..-1|0
    ...0|-1
    ...2|3
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  2. #2
    Junior Member
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    I'll get you started...

    f(x) for any x should give a unique answer... if it does not then your function has no inverse

    examine f(x) =  x^2
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  3. #3
    No one in Particular VonNemo19's Avatar
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    Detroit, MI
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    Quote Originally Posted by Marino View Post
    a) f(x) = 10^x


    b) f(x) = x^2 - 10


    c)
    _x_|_f(x)_
    ..-3|-1
    ..-1|0
    ...0|-1
    ...2|3
    Do you know

    1. The definition of an inverse function

    2. The horizontal line test?
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  4. #4
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    Yes, I know what an inverse function is. It's when the dependent and independent variables of a function are interchanged.
    No, I've never heard of the horizontal line test before.
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  5. #5
    Senior Member Stroodle's Avatar
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