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Math Help - Finding Range

  1. #1
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    Finding Range

    The domain of the following function is set for positive real number.
    Find the range of the funciton.

    f(x)= ln(1+e^x)

    I would appreciate it if you showed the way.
    Thank you!
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  2. #2
    Member
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    Sep 2009
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    Range!

    The domain of each of the following functions is the set of values of x for which the algebraic expression has meaning. Find their ranges.

    1) F(x)= 1/1+e^x

    2)f(x)=e^√x

    3) f(x)=e^-x2

    4) f(x)= √sinx

    Thank you in advance for your help!
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  3. #3
    MHF Contributor
    Joined
    Mar 2007
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    1,240

    Talking

    Your formatting is ambiguous, so I hesitate to be specific.

    Where are you stuck? You know that you can't have negatives inside square roots or logs, you can't have zero for a denominator or inside a log. How have you applied this information? How far have you gotten?

    Please be complete. Thank you!
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