В) 0.2(0.7x - 5) + 0.02 = 1.4(x - 1.6)
0.14x - 0.98 = 1.4x - 2.24
1.26 = 1.26x
x = 1.26/1.26
x = 1
г) 2.7(0.1x + 3.2) + 0.6(1.3 - x) = 16.02
0.27x + 8.64 + 0.78 - 0.6x = 16.02
-0.33x = 6.6
x = -6.6/0.33
x = -20
1)Sin5x = -sinx
Sin5x + sinx = 0
2*[sin(5x + x)/2]*[cos(5x - x)/2] = 0
[sin(6x)/2]*[cos(4x)/2] = 0
[sin(3x)]*[cos(2x)] = 0
a) sin3x = 0
3x = πn, n∈Z
x1 = πn/3, n∈Z
b) cos2x = 0
2x = π/2 + πk, k∈Z
x2 = π/4 + πk/2, k∈Z
2) sin(x/2)*sinx = 0
a) sin(x/2) = 0
x/2 = πk, k∈Z
x1 = 2πk, k∈Z
b) sinx = 0
x2 = πn, n∈ Z
1) 3^16 * 27^3 / 9^9 = 3^16 * 3^9 / 3^18 = 3^25 / 3^18 = 3^7
2) (5 1/3)^7 * (3/6)^4 = (16/3)^7 * (3/6)^4 = (32/6)^7 * (3/6)^4 = (32/6)^7 * (1/2)^4 = (32/6)^7 / 16