-8x(-4.4)x10.3+4x(-4.4)-4x10.3-3x10.3+2x(-4.4)+8x(-4.4)x10.3=362.56-17.6+41.2-30.9-8.8-362.56=-16.1
y' = x^2 - 18x + 80
y' = 0: x^2 - 18x + 80 = 0
D = 324 - 320 = 4
x1 = 10; x2 = 8 - не уд. усл.
y[9] = -2
y[10] = -4
y[14] = 44
ответ: -4
1)cos8a; 2)sin5; 3)cosacosb-sinasinb-cosacosb=-sinasinb; 4) cos8a
<span>t=корень из s - nv
t^2 = s - nv
nv = s - t^2
v = (s-t^2)/n
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