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berkeman
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Jul6-11, 11:40 AM
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Solve for x log3 (x-2) + log3 (x-4) = 7


Quote Quote by nae99 View Post
1. The problem statement, all variables and given/known data
i have been trying to do this ques. 2 days now and still cant get the ans.
help plz

Solve for x
log3 (x-2) + log3 (x-4) = 7




2. Relevant equations



3. The attempt at a solution
log3 (x-2) (x-4) = 7
Quote Quote by nae99 View Post
what does that mean
His hint was to use the inverse function of the logarithm as your first step.

So if you were working with log base 2, you would raise both sides to the exponent power of 2....

[tex]log_2 (x) = 5[/tex]

[tex]2^{log_2 (x)} = 2^5[/tex]

...and simplify the lefthand side...