Consider the following. (x - 3x) dx (a) Find an approximation to the integral using a Riemann sum with right endpoints and n = 8. Rg = (b) Draw a diagram to illustrate the approximation in part (a). 3 2 -1 -2 0-3 7 4 y 3 2 -2 7 9 4 2 y 5r 3 1 3 3 2 (c) Consider the following theorem. 00-31 -2 00-31 If f is integrable on [a, b], then f(x) dx = lim f(x) Ax, where x = ba and x, = a + iAx. Use this to evaluate the integral. i=1 n -2 00-34 212 4