Find the area of figure enclosed by straight line x = 0, x = 1, y = 0 and curve y = x (x-1) Using the "four step curve" to solve the trapezoidal area of curved edge

Find the area of figure enclosed by straight line x = 0, x = 1, y = 0 and curve y = x (x-1) Using the "four step curve" to solve the trapezoidal area of curved edge

Y = x ^ 2-x (1) & nbsp; divide the interval [0,1] into N equal parts (2) & nbsp; use the absolute value of the function value of the right end point between the I Th cells as the length of the I th small rectangle