Area between Curves
This Demonstration shows the variation between three different summation approximations and the exact solution for finding the area between two curves. The Demonstration allows you to change the upper and lower equations while varying the number of segments included in the summation. The three variations of summation are included and compared to the exact solution in this example to include right left and center points.
"Calculus Early transcendentals", James Stewart 6th Edition Thomson Brooks/Cole 2008.
"Area between Curves"
Wolfram Demonstrations Project
Published: August 20 2009