Definite Integral

This example demonstrates the concept of definite integral, showing how to use it to calculate area. The core mathematical concepts involved include integral and area. The construction points include using GeoGebra's Sequence, Sum, and Integral commands, as well as objects a, eq1, b, eq2, f, n, l1, l2, l3, c, d, text1, text2, e, and text3. Suitable for middle school math and college math.