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# Logs HELP!!

Maths and statistics discussion, revision, exam and homework help.

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1. Logs HELP!!
Hi, im stuck on a logarithms question, - 3^(x-1) = 8^ (x+1)

my working so far => x-1/x-2 = log10(3)/log10(8)

==> ( i dont know how to divide x-1 from x-2) or do you even do that? = 0.53

Thanx
2. Re: Logs HELP!!
you should have

(x-1)/(x+1) = ln(8)/ln(3)
3. Re: Logs HELP!!
(Original post by steve10)
you should have

(x-1)/(x+1) = ln(8)/ln(3)
I think this is better.

Last edited by steve2005; 21-04-2012 at 19:14.
4. Re: Logs HELP!!
thanx i got it
5. Re: Logs HELP!!
Mind telling me what the answer is? I've been trying to work it out lol
6. Re: Logs HELP!!
(Original post by PoorLoser)
Mind telling me what the answer is? I've been trying to work it out lol
This should help.
Attached Thumbnails

7. Re: Logs HELP!!
(Original post by PoorLoser)
Mind telling me what the answer is? I've been trying to work it out lol
sure its -3.24
8. Re: Logs HELP!!
(Original post by zoey21)
sure its -3.24

Yes, but if you are still not sure use your calculator to check.

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Last updated: April 22, 2012
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