The Student Room Group

Can someone please help me solve this question about logarithms ??

I'm sure it's fairly easy to do this, but my book didn't explain how to do it and then i got asked the question. SO can somebody please solve this for me and show me the steps on how to do it please.

Here it is: "Write the following expression in the form log x where x is a number." and then some example questions would be a) log 5 + log 2 or b) log 6 - log 3 or c) 2 log 6 and d) -log 7
Original post by gavinfourie
I'm sure it's fairly easy to do this, but my book didn't explain how to do it and then i got asked the question. SO can somebody please solve this for me and show me the steps on how to do it please.

Here it is: "Write the following expression in the form log x where x is a number." and then some example questions would be a) log 5 + log 2 or b) log 6 - log 3 or c) 2 log 6 and d) -log 7


The three main rules for logarithms you need to know are:
Log(a) +log (b) = log (ab)
Log (a) - log (b) = log (a/b)
(And this works for any Base as long as they're the same)

Log (a^n) =nlog (a)
Reply 2
Original post by NotNotBatman
The three main rules for logarithms you need to know are:
Log(a) +log (b) = log (ab)
Log (a) - log (b) = log (a/b)
(And this works for any Base as long as they're the same)

Log (a^n) =nlog (a)


Thanks! Don't know why the textbook couldn't have just told me that. So simple really. Anyways, this has actually helped me alot so thank you very much!

Quick Reply

Latest