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October 21, 2014

October 21, 2014

Posted by **Hannah** on Thursday, September 10, 2009 at 12:51pm.

log4 x - log4(x-1) = 1/2

I have no idea how to do this. Please help!

- math -
**bobpursley**, Thursday, September 10, 2009 at 12:58pmremember log a- log b= log(a/b)

so with that..

log4 (x/(x-1))=1/2

x/(x-1)= 16

then solve for x.

- math -
**Anonymous**, Friday, September 11, 2009 at 1:37pmGreetings:

log_4[x] - log_4[x-1] = 1/2 implies log_4[x/(x-1)] = 1/2 which means that 4^(1/2) = x/(x-1) or, 2 = x/(x-1). I shall assume you can finish from there.

Regards,

Rich B.

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