Question 861839
<pre><font face = "consolas" color = "indigo" size = 3><b>
Hi
Using {{{log(a, p) = log(b,p)/ (log(b, a)) }}}
{{{log(x^12)/log(4,64)- log(4,x^6)/log(4,16)}}}
{{{log(x^12)/3 - log(4,x^6)/2}}}

{{{log(4,x^4)- log(4,x^3) = log(4, x^4/x^3) = log(4,x)}}}