d d x f ( x ) = f ′ ( x ) {\displaystyle {\frac {d}{dx}}f(x)=f'(x)} d f ( x ) = f ′ ( x ) d x {\displaystyle df(x)=f'(x)dx} f ( x ) = ∫ f ′ ( x ) d x {\displaystyle f(x)=\int f'(x)dx} /연습장
