The change-of-base formula for changing log x into base e is log x=

Question

The change-of-base formula for changing log x into base e is log x=

Which answer would it be?

A. log x/log 10

B. ln x/ln 10

C. log 10/log x

D. log x/log e

F. ln x/ln e

Answer 1

Change of base formula gives log base e of x/ log base e of 10, but we use ln instead of Log base e. There fore the correct answer is B : lnx/ln10