Google Classroom
GeoGebraGeoGebra Classroom

herer you can see a function with its lower sum and upper sum on the interval[A,B]

1.Drag the end points A and B of the interval  the mouse What the characteristics of the rectangles of the (a) lower sum ,(b) upper sum,do you see? 2.Change the number of rectangels n by moving the slider with the mouse how dose this affect the difference between lower and supper sum ?