Răspuns:
Explicație pas cu pas:
30) f'(x) = 3(3x^2 -5x +1)^2*(6x -5)
34) f'(x) = cos6x *6 = 6cos6x
36) f'(x) = (2x+2)/(2√(x^2 +2x -3)) =
(x+1)/(√(x^2 +2x -3))
42) f'(x) = (2x(x^2 -1) -(x^2+1)*2x)/2√((x^2+1)(x^2 -1)) =
(x^3 -x -x^3 -x)/√((x^2+1)(x^2 -1)) =
-2x/√((x^2+1)(x^2 -1))
47) f'(x) = 5/(5x +2)
