math log

if log6=m and log 5=n, write 7.2 as an expression in m and n

Answer is 2m-n

Please help me!!

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  1. 7.2=36/5
    36=6*6

    log(a+b=log(a)+log(b)


    log(36)=log(6)+log(6)=2*log(6)


    log(a/b)=log(a)-log(b)

    log(36/5)=2*log(6)-log(5)

    log(6)=m log(5)=n

    log(36/5)=log(7.2)=2m-n

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    posted by Bosnian
  2. Third row have typefeler

    Correct formula is:
    log(a+b)=log(a)+log(b)

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    posted by Bosnian

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