# Natural Logarithm

• November 4th 2008, 12:02 AM
B.Major
Natural Logarithm
I am trying to evaluate $lnbase7of10$ but I am not sure how to go about doing so. Any pointers?
• November 4th 2008, 01:08 AM
earboth
Quote:

Originally Posted by B.Major
I am trying to evaluate $lnbase7of10$ but I am not sure how to go about doing so. Any pointers?

Do you mean $\log_7(10)$ ?

If so: Use the base-change-formula:

$\log_b(n)=\dfrac{\ln(n)}{\ln(b)}$