Integral and Rectangle Accumulation Demo

This example demonstrates the process of approximating an integral by increasing the number of rectangles, visually showing the accumulation effect. Core mathematical concepts include integral, rectangle approximation (left, middle, right), linear functions, and geometric distribution. Construction highlights involve GeoGebra commands like Integral for exact integration, LeftSum, TrapezoidalSum, UpperSum for different rectangle approximations, and Text, Textfield for displaying results. Objects include f, lft, rt, Exact, NumbrRectan, LOWer, Trapz, UPPER, text1, text3, text4, inputBox1, text2. Suitable for high school and above students to understand integral concepts and numerical methods, or for teaching demonstrations.