1.
a) 3-2x≥0
-2x≥-3
x≤1.5
b) x² -1≠0
x²≠1
x₁≠ 1
x₂≠ -1
(-∞; -1)U(-1; 1)U(1; 1.5]
1 - D.
2.
a) 3-2x≥0
x≤1.5
b) x-1>0
x>1
(1; 1.5]
2 - A
3.
(3-2x)(x+1)≥0
-2(x-1.5)(x+1)≥0
(x-1.5)(x+1)≤0
x=1.5 x= -1
+ - +
-------- -1 ------------- 1.5 ------------
\\\\\\\\\\\\\\
[-1; 1.5]
3 - Г.
4.
a) 3-2x≥0
x≤1.5
b) x+1>0
x> -1
(-1; 1.5]
4 - Б.
=2*кореньХ+ 8*кореньХ-9*кореньХ= кореньХ*(2+8-9)= кореньХ
(3/5)⁸⁻²ˣ < (3/5)²⁽ˣ⁺³⁾
8-2х < 2(х+3)
8-2х < 2х+6
-2х-2х < 6-8
-4х < -2
4x > 2
x > 2/4
x > 1/2
x > 0,5
(2+1)(2+1)*2×(2+1)*4×(2+1)*8×(2+1)*32=(2+1)*46=2*46+1