x=f(t),dx=f'(t)dt
问题描述:
x=f(t),dx=f'(t)dt
答
x=f(t)
dx=df(t)=(df(t)/dt)*dt=f'(t)dt
x=f(t),dx=f'(t)dt
x=f(t)
dx=df(t)=(df(t)/dt)*dt=f'(t)dt