f'(x) = 3x^2 - 12; 3x^2 - 12 = 0 и x^2 = 4 => x = +-2;
Ответ: x = +-2.
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f'(x) = 3x^2 - 12; 3x^2 - 12 = 0 и x^2 = 4 => x = +-2;
Ответ: x = +-2.