\frac{X(t \Delta t)-X(t)}{(t \Delta t)-t}=\frac{X(t \Delta t)-X(t)}{\Delta t}=V(t)\ \ (\Delta t \rightarrow0)
Embed the image to your blog in HTML, Markdown, Textile, BBCode.
Recent Referers:
  1. http://formula.s21g.com/