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Math Help - Help me to Solve this please....

  1. #1
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    Help me to Solve this please....

    Solve the equation In(x) + In(x+2)=1.solve for me this question...thank u
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  2. #2
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    Re: Help me to Solve this please....

    Quote Originally Posted by sharmala View Post
    Solve the equation In(x) + In(x+2)=1.solve for me this question...thank u
    1. Use the property:

    \ln(a) + \ln(b) = \ln(a \cdot b)

    2. Use the property:

    \ln(a)=b~\implies~a=e^b
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  3. #3
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    Re: Help me to Solve this please....

    [QUOTE=earboth;745036]1. Use the property:

    \ln(a) + \ln(b) = \ln(a \cdot b)

    2. Use the property:

    \ln(a)=b~\implies~a=e^b[/QUOTE




    Isn't ab = e
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  4. #4
    MHF Contributor MarkFL's Avatar
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    Re: Help me to Solve this please....

    Yes, you will find:

    \ln(x)+\ln(x+2)=1

    \ln(x(x+2))=1

    x(x+2)=e^1=e

    x^2+2x-e=0

    Now you may apply the quadratic formula, and discard any roots outside of the domain of the original expression.
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