Thread: logarithmic problems

I have been working on these problems and I must have a logic problem, could you put me in the right direction? Here is the problem and what I have done:
If A=2, B=3, C=5 I am supposed to evaluate the following:
ln(A^3/B^-3C^3)
ln(A^3)-ln(B^-2)-ln(C^3)
3lnA + 2lnB - 3lnC
3ln(2) + 2ln(3) - 3ln(5) = -5516476183
The back of my calc book tells me the answer is incorrect, could you let me know where I went wrong.
Thank you!!!!!!!!!!!!!!!!!
Keith Stevens

Hello, Keith!

Did you leave out part of the problem?

If , evaluate: .

There is a difference between and .

Is somehow related to ?
If not, it's a truly stooopid problem . . .

Here's another: .If and , evaluate

Originally Posted by kcsteven

3ln(2) + 2ln(3) - 3ln(5) = -5516476183

What??? You DID mean: -0.5516476183, yes?

Originally Posted by kcsteven

If A=2, B=3, C=5 I am supposed to evaluate the following:
ln(A^3/B^-3C^3)

Your problem is a slight typo in the second term:




-Dan