Express the given quantity as a single logarithm. ln(a + b) + ln(a - b) - 9 ln(c)
Here is what I did:
ln a + ln b + ln a - ln b - 9 ln c
The ln b's cancel.
ln a + ln a - 9 ln c
Then combine to one logarithm.
ln(a^2 - c^9)
The outcome I got was incorrect. I was just wondering if you could point me in the right direction or point out my flaws. Thanks!