log(1/8)x+5log4x+log(sqrt(2))x = 16 целых 2/3
log_(a^(k))b=[m]\frac{1}{k}[/m]log_(a)b
log_(1/8)x=log_(2^(-3))x=(-1/3)log_(2)x
log_(4)x=log_(2^2)x=(1/2)log_(2)x
log_(sqrt(2))x=log_(2^(1/2))x=2log_(2)x
(-1/3)log_(2)x+(5/2)log_(2)x+2log_(2)x=50/3
(25/6)log_(2)x=50/3
log_(2)x=4
x=2^4
[b]x=16[/b]