Question

what is log4 7*the four is a footnote type of thing*

Answer 1

footnote type of thing?

Answer 2

yeah just like that
do you know the answer?

Answer 3

You want to simplify it?

Answer 4

it says use the change of base formula to evalute log 4 7

Answer 5

and i have no clue what that means, could you like show me how to do it so i can do the rest as well lol i have no idea how to do this.

Answer 6

You can use
\[\huge \log_a(b)=\frac{\log_c(b)}{\log_c(a)}\]

Answer 7

Then change like this
\[\huge \log_47=\frac{\log7}{\log4}\]

Answer 8

thank you very much :)

Answer 9

'c' would be 10, it's hidden

Answer 10

thank you :)

Answer 11

welcome :)

Answer 12

If you need to know more see
http://www.khanacademy.org/math/algebra/logarithms-tutorial/logarithm_basics/v/logarithms
for a quick introduction.

and here is a short video on the change of base formula
http://www.khanacademy.org/math/algebra/logarithms-tutorial/logarithm_properties/v/change-of-base-formula