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Math Help - logs problem

  1. #1
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    logs problem

    log2 (x+1) + log2 (x-1) = 3 ..... log to base 2
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  2. #2
    No one in Particular VonNemo19's Avatar
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    Note that

    \log_bx+\log_by=\log_b(xy)

    And

    \log_bx=y if and only if b^y=x.

    With these two propeties of logarithms, you should be able to solve this equation.
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