5. 다항함수 f(x)f(x)f(x)가 f′(x)=3x(x−2), f(1)=6f'(x)=3x(x-2),\ f(1)=6f′(x)=3x(x−2), f(1)=6을 만족시킬 때, f(2)f(2)f(2)의 값은? [3점]