3 ≤ |2х-3| < 7
1. 3 ≤ |2х-3|
3 ≤ 2х-3
2x>=6
x>=3
2x-3<=-3<br>x<=0<br>x=(-00 0] [3 +00))
2. |2х-3| < 7
2x-3<7<br>x<5<br>2x-3>-7
2x>-4
x>-2
-------------- (-2) /////////////////////// (5)------------------
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\[0]--------[3]\\\\\\\\\\\\\\\\\\\\\\\\\\\\
(-2 0] U [3 5)
итаго -1 0 3 4
(-1+0+3+4)/4= 6/4= 3/2=1.5
среднее арифм = 1.5 =3/2