<span>log4√2/2=1/2 log 2 2^-1/2=-1/4
</span><span>1,3 от 39= 1.3/39=0.033=3.33%</span>
3x + 8x - 18 = 15
11x = 18 + 15
11x = 33
x = 3
(3-3x²)`=-6x
-6x=0
x=0
+ _
-----------------(0)------------------
возр убыв
А - 4
Б - 2
В - 3
...........................