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cajunoffroader
May 9, 2008, 08:50 PM
The directions are to solve the logarithmic equation. Be sure to reject any value that is not in the domain oof the original logarithmic expressions. Give the exact answer.



I am unsure if I am doing this the right way. Ln x + Ln(x-1) = Ln 12.

am I supposed to distribute the x over the parenthesis? And if so do I then find the Ln of 12?

I am so confused :(

galactus
May 10, 2008, 05:11 AM
Using the log properties, you can rewrite the left side as ln(x(x-1))

ln(x(x-1))=ln(12)

If you take e to both sides you get x(x-1)=12

Now solve. Remember to reject what is not in the domain. No negatives or 0.