Х2+4х-8)/2x 2 только 2 маленькая, +x-6>=1
Ответ: (-2;1]U(1 .5;2]
X - 3y = - 3
x + y = 1 /*3
x - 3y = - 3
3x + 3y = 3
------------------ +
4x = 0
x = 0
y = 1 - x = 1
Ответ
(0; 1)
<span>16/35*х= 5/8 *24/105 * 576
</span><span>16/35*х= 3/21*576
</span><span>16/35*х= 3/7*192
</span>х=<span>3/7*192*35/16
х=3/7*12*35
х=3*12*5
х=180
</span>
|[3a-b]*[a-2b]| = | [3a,a] - [3a,2b] - [b, a] +[b,2b]| =
= |3*<u>0</u>- (6)*<u>[</u>a,b] - [b,a] +2*<u>0</u>| = | - (6)*<u>[</u>a,b] + [a,b] | =
= | - (5)*<u>[</u>a,b] | =|-5*|a| *|b|*sin(π/2) | = | -5*3*4*1| = |-60| = 60
<u>( </u>в решении <u> 0</u> обозначен нулевой вектор) ,