How do you use the Change of Base Formula and a calculator to evaluate #log_7 648#?

1 Answer
Nov 27, 2015

Answer:

#log648/log7#

Explanation:

#log_ab=logb/loga#

Notice that there is a #log# button on your calculator.

#log_7 648=log648/log7#

Put this into your calculator as "log(648)/log(7)"—don't forget the parentheses.