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Math

posted by on .

Contract the expressions.
In (3) - 2 In (4)+ In (8)=
In (3) - 2 In (4+8) =
In (3) - 2 (In (4) + In (8) ) =

  • Math - ,

    You will have to know the 3 main rules of logs
    1. Log (AB) = logA + logB
    2. log(A/B) = logA - logB
    3. log (A^n) = nlogA

    e.g, for
    ln3 - 2ln(4+8)
    = ln3 + 2ln12
    = ln3 + ln(12^2)
    = ln3 + ln144
    = ln (3/144)
    = ln (1/48)
    = ln 1 - ln48
    = 0 - ln48
    = - ln48

    do the others the same way
    use your calculator to check your answers

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