log4(1/2+x) = log4(x) +1/2 log4(1/2+x) = log4(x) +log4(2) log4(1/2+x) = log4(x+2) 1/2+x=x+2 1/2+x=2+x 1=(2+x)^2 |2+x| =1 2+x =1; x= -1 или 2+x =-1; x=-3 ответ x={-3; -1}