## Thomas' Calculus 13th Edition

-Graphing each function ƒ(x) over the given interval. -Partitioning the interval into four subintervals of equal length. Then adding to sketch the rectangles associated with the Riemann sum $\Sigma^4_{k=1}$ƒ($c_k$) Δ$X_k$ , given that $c_k$ is the (a) left-hand endpoint, (b) right handend point, (c) midpoint of the kth subinterval. (Making a separate sketch for each set of rectangles.)