Question #d4c38

1 Answer
Dec 12, 2017

#ln(x)/ln(7) = ln_7x#

Explanation:

If function f(x) has inverse g(x), then f(g(x)) = x.

#ln_7(7^x) = x#. By the change of base rule, this transforms to #ln(x)/ln(7)#

These exponentiation ones can be tough, so be careful! I messed this one up my first and second tries!

GOOD LUCK