# Math Help - Logarithm Question

1. ## Logarithm Question

hey guys i need help on a question:
If log 5 = m and log 7 = n, find log (35/10) in terms of m and n.

Thanks

2. Originally Posted by Numbnut247
hey guys i need help on a question:
If log 5 = m and log 7 = n, find log (35/10) in terms of m and n.

Thanks
You probably mean that $\log 2=m$?
Then
$\log (35/10)=\log (7/2)=\log 7-\log 2=n-m$.
Q.E.D.

3. ## an other solution

Originally Posted by Numbnut247
hey guys i need help on a question:
If log 5 = m and log 7 = n, find log (35/10) in terms of m and n.

Thanks
if you had the algebric equation log((a*b)/c)=log(a)+log(b)-log(c)
and if log (10)=1
Then the awnser to your question would be m+ n-1
But i always mix up whith all those formula
check it whith a calculus machine if youve got one!

by!