SOLUTION: Given that {{{u=log(9,x)}}}, find in terms of u, {{{log(2,81)}}} *PLEASE ANSWER AS SOON AS POSSIBLE BRO!!!!!! :) =)

Question 467006: Given that , find in terms of u,

*PLEASE ANSWER AS SOON AS POSSIBLE BRO!!!!!! :) =)
Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!

Erase the log and swap the two outer numbers,
leaving the base of the log as the base of
the exponent:



----------------------

To find  use the change of base formula:



We have logs base 10 on the calculator so we let the new base
be 10 and the old base be 2

 

Edwin

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