log questions

To change the base of a log, use the change-of-base formula.

If  n = new base

    b = old base

    x  = the number:

   log_n(x)  =  log_b(x) / log_b(n)

 

Example:  log₇(23)  =  log(23) / log(7)

    or:          log₇(23)  =  ln(23) / ln(7)