Hi there, I'm stuck on this logs question and can't find an example in any books that fits this form. show that I try to break the logs down to different forms but never get anything suitable to allow for a substitution. Any pointers? Thanks, F
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Originally Posted by FelixHelix Hi there, I'm stuck on this logs question and can't find an example in any books that fits this form. show that I try to break the logs down to different forms but never get anything suitable to allow for a substitution. Any pointers? Thanks, F Taking logs: Splitting logs: Using the power rule on each individual term: Isolating the x's: Taking out a factor of x and rewriting things using the power rule: See if you can proceed, using the rules that: and
I would start by first rewriting and into and respectively. Then go from there. See if that is enough to get you going.
Doing it by using logs like Quacky suggested is one way. What I suggested leads to: Rearrange terms and get: Simplify: From here, take the natural log of both sides and "Wallah!"
Thanks everyone - I'd gone down that avenue of rewriting but must have made a mistake (several times!) Thanks again. F