Firstly, (4,4 √ 3) is brought in, because it is a proportional function, and the analytical formula can be directly obtained as y=√3 x. Then, because the abscissas of all points are known, the upper and lower bottoms of each trapezoid can be obtained by bringing in, and the trapezoidal area can be easily obtained. After getting the area of each trapezoid, the final answer can be "Sn=(8n-4)√3". !