5. Assume that n is a positive integer. Then, use the Cauchy formula to calculate the following sums: @ п Σ()(-1): k=1 2 Σ(). k=0

approximate the intergal with upperbound 4 and lowerbound 1 of the function lnx dx by finding the following Reimann Sums.  Sketch a graph and the approximating rectangles for each.   a. L6 b.M3

Use the summation notation to rewrite the following expression. - - - (1³ − 6) − (2³ − 6) + (3³ − 6) − (4³ − 6) + (5³ – 6) – (6³ − 6) = Σ - k = 1 X