1) 2 + 8 = 10 (частей всего)
360° : 10 = 36 (1 часть)
36° * 2 = 72° (1 угол)
36° * 8 = 288° (2 угол)
2) 360° : 12 = 30° (угол в 5 минут)
30° * 5 = 150°
Tgx/2(cosx+1)=0
tgx/2=0 cosx+1=0
x/2=πn, n∈Z cosx=-1
<u> x=2πn, n∈Z </u> <u>x=π+2πk, k∈Z</u>
Решение
1. y = (2x-3)*x² в x0=1
y = [(2x-3)*x²]` = 2*x² + 2x*(2x - 3) = 2x² + 4x² - 6x = 6x² - 6x
y(1) = 6*1² - 6*1 = 0
2. y = (2+3x)/5x² в x0=2
y` = (2+3x/5x2)` = [3*5x² - 10x*(2 + 3x)]/(5x²)² =
= (15x² - 20x - 30x²)/(25x⁴) = (- 30x² - 20x)/(25x⁴) =
= [(- 5x)*(6x + 4)] / (25x⁴) = - (6x + 4)/(5x³)
y(2) = - (6*2 + 4)/(5*2³) = - (16/40) = - 2/5 = - 0,4
3. y = 3*ln(2x³ - 3x) в x0=2
y` = 3/(2x³ - 3x) * (6x² - 3) = (18x² - 9)/<span>(2x³ - 3x)
y(2) = </span>(18*2² - 9)/<span>(2*2³ - 3*2) = 63/10 = 6,3</span>
<span>5/6(4.2х-1 1/5у)-5.4(2/9х-1.5у)=3,5x-y</span>-1,2x+8,1y=2,3x+7,1y