Definite Integral Investigation

This example demonstrates the concept and calculation of definite integrals. Using the LowerSum and UpperSum commands in GeoGebra, the approximation process of definite integrals can be observed intuitively. The core mathematical concepts involved include definite integrals and integral calculus. By adjusting the function, interval, and number of partitions, one can gain a deeper understanding of the definition and properties of definite integrals. Suitable for high school mathematics education and learning.