Решите уравнение f(x)=0: 1)f (x)= 3x^2+8x+2; 2) f(x)= -6x^2 +13 -1; 3) f(x)= (3\2) * x^2 + 4x -1; 4) f(x)= -0,5x^2 - 4x + 0,1.

1) f (x) = 3x^2 + 8x + 2 f'(x) = 6x + 8 f' (x) = 0 => 6x + 8 = 0 6x = -8 x = -8/6 x = -4/3 = - 1 целая 1/3 2) f'(x) = -12x -12x = 0 x = 0 3) f'(x) = 3x + 4 3x + 4 = 0 3x = - 4 x = - 4/3 4) f'(x) = -x - 4 - x - 4 = 0 - x = 4 | × (-1) x = - 4