ОДЗ
x>0
log(2)x≠0⇒x≠1
log(2)x-4≠0⇒log(2)x≠4⇒x≠16
x∈(0;1) U (1;16) U (16;∞)
log(2)x=a
1/(a-4)-1/a>0
(a-a+4)/a(a-4)>0
4/a(a-4)>0
4>0⇒(a(a-4)>0
a=0 a=4
+ _ +
----------(0)------------(4)----------------
a<0⇒log(2)x<0⇒x<1<br>a>4⇒log(2)x>4⇒x>16
x∈(0;1) U (16;∞)