<span>области определения
y = 2x - 4 x</span>∈R
y=x/4x+8 4x+8≠0 x≠-2
область значений y=(2x-5)/2 [-1;5]
y=x-2.5 возрастающая функция
x=-1 y=-3.5
x=5 y=5-2.5=2.5
Обл. значений [-3.5;2.5]
А) \\\\\\\\\\\\\\\\\\\\\\\\\\
-------------------[-2]-----------------→
[]- сплошной кружок в точке х=-2
б)
х > 0
\\\\\\\\\\\\\\\\\\\\\\\\\\\\
--------------------(0)-------------------------------→
() пустой кружок
x < 0
\\\\\\\\\\\\\\\\\\\\\\\\\\\
--------------------(0)-------------------------------→
х ≥0
\\\\\\\\\\\\\\\\\\\\\\\\\\\\
--------------------[0]-------------------------------→
x ≤ 0
\\\\\\\\\\\\\\\\\\\\\\\\\\\
--------------------[0]-------------------------------→
1917817ц72171 17717рчрвлвлвовв
1. 4х+4=-6х-5
4х+6х=-5-4
10х=-9
х=-9/10= -0,9
2. 3х+3=-2-7х
3х+7х=-2-3
10х=-5
х=-5/10=-0,5
3. 7-6х=-4х-6
-6х+4х=-6-7
-2х=-13
х= 13/2 = 6,5
4. 9-4х=-9х-4
-4х+9х=-4-9
5х=13
х=13/5 = 2,6