Approximate the area under f(x) = (x – 1)2, above thex-axis, on [2,4] with n = 4 rectangles using the (a) left endpoint,(b) right endpoint and (c) trapezoidal rule (i.e. the “averageâ€shortcut). Be sure to include endpoint values and write summationnotation for (a) and (b). Also, on (c), state whether the answerover- or underestimates the exact area and why.
