<span>а) y=5x-1</span>
<span> x+3y=5 </span>
<span>у=5х+1</span>
<span>х+15х-3=5</span>
<span>у=5х+1</span>
<span>16х=8</span>
<span>у=5х+1</span>
<span>х=0,5</span>
<span>у=2,5-1</span>
<span>у=1,5</span>
<span>Ответ: (0,5;1,5)</span>
<span>б) 4x+y=3/*2</span>
<span> 6x-2y=1</span>
<span> 8х+2у=6</span>
<span>+</span>
<span> <u>6х-2у=1</u></span>
14х=7
х=0,5
2+у=3
у=1
Ответ: (0,5;1)
Ставь лучшим!)))
-x^2=4x
-x^2-4x=0
x(-x-4)=0
x=0 -x-4=0
-x=4
x=4
У = sin 3x + tg2x. Оскильки tg не визначений у точках, де cos=0, то<span>
D(у):
2х</span>≠π/2 +πn
х≠π/4 + πn/2, n∈Z.