Question 6 (1 point) If f (x) = e(cos(x3) ) 4 then f'(x) equals Oa) f' ( x) = 12x2e(cos(x3))*(cos(x3))3(-sin(x3)) Ob) f' (x) = 4e(cos(x ))*(cos(x3))3(- sin(x3)) O c ) f' (x) = e (cos( ))*(cos(x3))3(- sin(x3))(3x2) O d) f' ( x ) = 4(cos(x3) )3(sin(x3) ) (3x2 ) (e) None of the above