А) f (x) = 2x^5-4x^3 в) f (x) = 1/4x^3*ctgx^2 б) f (x) = sinx-2x^3 г) f (x) = 2x|x|-3x

а) (f (x)) ' = (2x^5 - 4x^3) ' = (2x^5) ' - (4x^3) ' = 10x^4 - 12x^2;

б) (f (x)) ' = (1 / 4x^3 * ctg (x^2)) ' = (1 / 4x^3) ' * ctg (x^2) + 1 / 4x^3 * (ctg (x^2) = - 3/4 * x^ (-4) + 1 / 4x^3 * (-1 / sin^2 (x^2)) * 2x.

в) (f (x)) ' = (sin (x) - 2x^3) ' = (sin (x)) ' - (2x^3) ' = cos (x) - 6x^2.

г) (f (x)) ' = (2x|x| - 3x) ' = 2|x| + - 2x - 3.