IRA Integrator
Integrator Applet to find right, left, and general Riemann sum as well as upper and lower sums (part of the Interactive Real Analysis project). |
Also check the general introduction to the Riemann integral as well as a discussion of various integration techniques. You may also want to learn more about the Lebesgue integral, a generalization of the Riemann integral.
This "mathlet" has been published in Journal of Online Mathematics and its Applications. Click here for the online reference.