Answer
(a) left-hand endpoint,
(b) right handed point,
(c) midpoint of the kth sub-interval
Work Step by Step
-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.)
