X^2 - x/6 - 2 = 0
D = (-1/6)^2 - 4*1*(-2) = 1/36 + 8 = 289/36
x1 = (1/6 + 17/6)/2 = 18/12 = 3/2,
x2 = (1/6 - 17/6)/2 = -8/6 = -4/3.
<span><span>((3x-1)е^х)' = (3x-1)'е^х+ (3x-1)(е^х)' = 3*e^x+(3x-1)*e^x = (3x+2)*e^x
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((sina-cosa)^2-1+sin4a)/(cos2a+cos4a)=(sina^2-2sinacosa+cosa^2-sina^2-cosa^2+sin4a)/(cos2a+cos4a)=(-2sinacosa+sin4a)/ (cos2a+cos4a)=(-sin2a+2sin2a)/(cos2a+2cos2a)=
(sin2a(-1+2))/(cos2a(1+2)= sin2a/3cos2a=tg2a/3