Question 668395
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
{{{log(x, 2)= -2}}} &#8658; {{{x^(-2) = 2}}} &#8658; {{{x^2 = 1/2}}}, x = {{{sqrt(2)/2}}} 

{{{log(x, 0.4)= 2}}}&#8658; {{{x^(2) = 4/10}}}&#8658;  {{{x = 2/sqrt(10) = sqrt(10)/5}}}