Question 641637
{{{ f(1/2)= log (2, x) }}}
{{{ f(1/2)= log (2, 1/2) }}}
{{{ f(1/2)= log (2, 1/2^1) }}}
{{{ f(1/2)= log (2, 2^(-1)) }}}
{{{ f(1/2)= -1 }}}