Question 845417
{{{log(7,3)=a}}} means {{{7^(a)=3}}}
{{{7^(b)=63}}}
{{{7^(b)=3*3*7}}}
{{{7^(b)=7^(a)*7^(a)*7}}}
{{{7^(b)=7^(2a+1)}}}
So then
{{{log(7,63)=2a+1}}}