Log2 x+log2² x +log2³ x=11/6
log2 x+(1/2)log2 x+(1/3)lo2 x=11/6
(log2 x)(1+1/2+1/3)=11/6
(log2 x)(11/6)=11/6
log2 x=1
x=2
5x+5x+1=10x+1
(8x+y)(8x+y)+1=16x+2y
13, 14, 15, 16 всё правильно
412–4 408 204
--------- = ------- = ------
990 990 495
№1
3+1+5+0+1=10
10 : 5 = 2
Ответ: 2